-
question_answer1)
In ecosystem lithosphere is concerned with
A)
Gases done
clear
B)
Minerals done
clear
C)
Water done
clear
D)
All the above done
clear
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question_answer2)
Which of the following is producer of plant kingdom
A)
Melia done
clear
B)
Ficus done
clear
C)
Ziziphus done
clear
D)
All the above done
clear
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question_answer3)
The net primary productivity of an ecosystem is
A)
Total weight of green plants - respiratory losses done
clear
B)
Total weight of green plants + respiratory losses done
clear
C)
Respiratory losses alone done
clear
D)
None of the above done
clear
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question_answer4)
Primary producer of an ecosystem is
A)
Herbivores done
clear
B)
Carnivores done
clear
C)
Both a and b done
clear
D)
Green plants done
clear
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question_answer5)
Which of the following are consumers of second order
A)
Herbivores done
clear
B)
Carnivores done
clear
C)
Top carnivores done
clear
D)
None of the above done
clear
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question_answer6)
When food energy passes from herbivores to carnivores
A)
Some energy is increased done
clear
B)
Some energy is decreased done
clear
C)
Remain unchanged done
clear
D)
Not relevant done
clear
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question_answer7)
What is studied under the ??microcosm??
A)
Ecosystem done
clear
B)
Livings done
clear
C)
Non-livings done
clear
D)
None of the above done
clear
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question_answer8)
Which of the cycle is concerned with energy flow in the ecosystem
A)
Food cycle done
clear
B)
C)
D)
All the above done
clear
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question_answer9)
In a given ecosystem number of individuals in species remain more or less constant over a period of time. The constancy of number is maintained by
A)
Parasite done
clear
B)
Predators done
clear
C)
Man done
clear
D)
Available food done
clear
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question_answer10)
Which group of living organisms given below is a link in food chain between green plants and hawk
A)
Grasshopper, frog and snake done
clear
B)
Grasshopper, rat and snake done
clear
C)
Millipedes, centipedes and sparrow done
clear
D)
Earthworm, hen and rat done
clear
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question_answer11)
The bacteria which attack dead animals are
A)
First link of the food chain and are known as primary producers done
clear
B)
Second link of the food chain and are herbivorous done
clear
C)
Third link of the food chain and are tertiary consumers done
clear
D)
The end of food chain and are decomposers done
clear
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question_answer12)
Which one statement is correct regarding man made ecosystem
A)
They are highly efficient done
clear
B)
They are poor in diversity done
clear
C)
They are vulnerable to drought, floods and diseases done
clear
D)
All are correct done
clear
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question_answer13)
Phosphorus usually becomes a limiting factor at certain times of the year in which ecosystem
A)
Aquatic ecosystem done
clear
B)
Grassland ecosystem done
clear
C)
Forest ecosystem done
clear
D)
All the above done
clear
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question_answer14)
Food and energy relationships among living components of ecosystem is generally referred as
A)
Biocoenosis done
clear
B)
Microcosm done
clear
C)
Bioenergetic approach done
clear
D)
None of the above done
clear
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question_answer15)
Detritus food chain starts from
A)
Dead organic matter done
clear
B)
Green plants done
clear
C)
Zooplanktons done
clear
D)
None of the above done
clear
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question_answer16)
In ecological crisis, whom interference play important role
A)
Green plants done
clear
B)
Human done
clear
C)
Biotic and abiotic components done
clear
D)
None of these done
clear
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question_answer17)
Whale is
A)
Primary producer done
clear
B)
Carnivorous secondary consumer done
clear
C)
A decomposer done
clear
D)
Herbivorous done
clear
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question_answer18)
The above represents
A)
Food chain done
clear
B)
Food web done
clear
C)
A population done
clear
D)
Ecosystem done
clear
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question_answer19)
A natural ecosystem
A)
Depends on man done
clear
B)
Depends on plants done
clear
C)
Depends on animals done
clear
D)
Is auto-operated done
clear
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question_answer20)
Which of the following in an ecosystem exhibits one-way flow rather than cyclic flow
A)
Potassium done
clear
B)
Carbon done
clear
C)
Free energy done
clear
D)
Nitrogen done
clear
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question_answer21)
Dynamic aspect of an ecosystem is
A)
Producer and energy flow done
clear
B)
Producer and mineral cycles done
clear
C)
Consumer and mineral cycles done
clear
D)
Energy flow and mineral cycles done
clear
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question_answer22)
Which of the following is a man made artificial ecosystem
A)
Grassland ecosystem done
clear
B)
Agro-ecosystem done
clear
C)
Ecosystem of artificial lakes and dams done
clear
D)
Forest ecosystem done
clear
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question_answer23)
Most important determinant of marine ecosystem is
A)
Rainfall done
clear
B)
Geographical location done
clear
C)
Depth or distance from the shore done
clear
D)
All the above done
clear
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question_answer24)
Plankton, nekton and benthos are not the components of
A)
River ecosystem done
clear
B)
Oceanic ecosystem done
clear
C)
Savannah ecosystem done
clear
D)
Lake ecosystem done
clear
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question_answer25)
In lake ecosystem the population rise or its explosion is termed
A)
Tide done
clear
B)
Bloom done
clear
C)
Plankton done
clear
D)
Nekton done
clear
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question_answer26)
Micro-consumers are
A)
Primary consumers done
clear
B)
Secondary consumers done
clear
C)
Tertiary consumers done
clear
D)
Decomposers done
clear
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question_answer27)
The trophic level of Cuscuta, Orobanche and Albugo is
A)
Decomposer done
clear
B)
Primary producer done
clear
C)
Primary consumer done
clear
D)
Secondary consumer done
clear
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question_answer28)
The trophic level of mushroom and Monotropa is
A)
Producer done
clear
B)
Primary consumer done
clear
C)
Secondary consumer done
clear
D)
Decomposer done
clear
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question_answer29)
The trophic level of S-bacteria and cyanobacteria is
A)
Producer done
clear
B)
Consumer done
clear
C)
Saprotrophic decomposer done
clear
D)
Phagotroph done
clear
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question_answer30)
If plant (producers) of an ecosystem die, then the system
A)
Cannot produce food done
clear
B)
Is seriously affected done
clear
C)
Can have more producers done
clear
D)
Is not much affected done
clear
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question_answer31)
The order of organism in an aquatic food chain is
A)
Bacteria ® Seal ® Diatom ® Fish ® Crustacea done
clear
B)
Crustacea ® Seal ® Fish ® Polar Bear ® Diatom done
clear
C)
Polar Bear ® Diatom ® Seal ® Crustacea done
clear
D)
Diatom ® Crustacea ® Fish ® Seal ® Bacteria done
clear
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question_answer32)
An ecosystem resists change because it is in a state of
A)
Homoeostasis done
clear
B)
Regular illumination done
clear
C)
Static imbalance done
clear
D)
Food accumulation done
clear
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question_answer33)
In an ecosystem, there are more prey than predators. This relationship is called
A)
Food webs done
clear
B)
Predator-prey relationship done
clear
C)
Pyramid of number done
clear
D)
Succession done
clear
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question_answer34)
Pyramid of number becomes partly inverted partly erect for
A)
Aquatic ecosystem done
clear
B)
Terrestrial ecosystem done
clear
C)
Tree ecosystem done
clear
D)
All the above done
clear
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question_answer35)
Idea of productivity of an ecosystem can be had from
A)
Pyramid of number done
clear
B)
Pyramid of biomass done
clear
C)
Height of the plant done
clear
D)
Development of foliage done
clear
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question_answer36)
The pyramid of biomass and the pyramid of number represent
A)
The rate of energy flow done
clear
B)
The rate of food production done
clear
C)
Standing crop done
clear
D)
Relationship among organisms done
clear
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question_answer37)
The pyramid of energy is the best representation of an ecosystem because it indicates
A)
Relation of all plants and animals done
clear
B)
Total energy present in an ecosystem done
clear
C)
The rate of food flow through the food chain done
clear
D)
None of these done
clear
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question_answer38)
Under what condition, the upright pyramid of biomass becomes inverted
A)
Grassland ecosystem done
clear
B)
Terrestrial ecosyslem done
clear
C)
Pond ecosystem done
clear
D)
Tree ecosystem done
clear
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question_answer39)
The storage of organic matter not used by heterotrophs is termed as
A)
Gross primary production done
clear
B)
Net secondary production done
clear
C)
Net production done
clear
D)
Secondary production done
clear
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question_answer40)
In an ecosystem, the largest population is of
A)
Producers done
clear
B)
Consumers done
clear
C)
Decomposers done
clear
D)
Omnivores done
clear
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question_answer41)
Transfer of material and energy from one ecosystem to other ecosystem is best examplified by
A)
Harvesting of fishes done
clear
B)
Grazing of pastureland done
clear
C)
Game hunting in Savannah done
clear
D)
Silvicultural practices in a woodland done
clear
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question_answer42)
Which of the following has the greatest amount of energy
A)
Insectivores done
clear
B)
Carnivores done
clear
C)
Herbivores done
clear
D)
Autotrophs done
clear
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question_answer43)
Herbivores are called
A)
Primary consumers done
clear
B)
Secondary producers done
clear
C)
Key industry animals done
clear
D)
All the above done
clear
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question_answer44)
Osmotrophs are also called as
A)
Producers done
clear
B)
Consumers done
clear
C)
Autotrophs done
clear
D)
Decomposers done
clear
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question_answer45)
The total rate of photosynthesis including the organic matter used up in respiration during definite period is known as
A)
Gross primary productivity done
clear
B)
Net primary productivity done
clear
C)
Secondary productivity done
clear
D)
None of above done
clear
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question_answer46)
Which one of the following system constitutes the primary producers
A)
Higher plants done
clear
B)
Algal phytoplanktons done
clear
C)
Bryophytes done
clear
D)
All the above done
clear
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question_answer47)
Which one of the following ecosystems is more productive in terms of carbon dioxide fixation
A)
Crop ecosystem done
clear
B)
Forest ecosystem done
clear
C)
Aquatic ecosystem done
clear
D)
Hot spring ecosystem done
clear
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question_answer48)
The second order consumer in a food chain is
A)
Cattle done
clear
B)
Deer done
clear
C)
Tiger done
clear
D)
Goat done
clear
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question_answer49)
In an ecosystem energy flows in
A)
One direction done
clear
B)
Two direction done
clear
C)
Four direction done
clear
D)
All directions done
clear
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question_answer50)
The planktonic forms are
A)
Autotrophs done
clear
B)
Heterotrophs done
clear
C)
Chemotrophs done
clear
D)
Insectivorous types done
clear
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question_answer51)
Which one of the following contains very low concentrations of dissolved inorganic nutrients for algal growth
A)
Oligotrophic lake done
clear
B)
Eutrophic lake done
clear
C)
Mesotrophic lake done
clear
D)
Both eutrophic and mesotrophic lakes done
clear
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question_answer52)
Standing state of the ecosystem is
A)
Living and non-living components done
clear
B)
Only living components done
clear
C)
Total weight of non-living components done
clear
D)
None of the above done
clear
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question_answer53)
Which ecosystem does not show variations dependent upon geographic location and rainfall
A)
Marine ecosystem done
clear
B)
Fresh water ecosystem done
clear
C)
Desert ecosystem done
clear
D)
Tropical ecosystem done
clear
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question_answer54)
In food web hyaenas and vultures are
A)
Primary consumers done
clear
B)
Predators done
clear
C)
Scavengers done
clear
D)
Decomposers done
clear
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question_answer55)
If all the plants of the world die all the animals will also die due to shortage of [CPMT 1975, 78; AFMC 1989]
A)
Cold air done
clear
B)
Oxygen done
clear
C)
Food done
clear
D)
Timber done
clear
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question_answer56)
Maximum solar energy may be trapped by [BHU 1978]
A)
Growing grasses done
clear
B)
Planting trees done
clear
C)
Growing algae in large water bodies done
clear
D)
More cultivation of crop plants done
clear
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question_answer57)
A wolf has just eaten a lamb when tiger saw the wolf attacked it and consumed it. The tiger is in ecological terms [CPMT 1982]
A)
A producer done
clear
B)
A primary consumer done
clear
C)
A secondary consumer done
clear
D)
A tertiary consumer done
clear
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question_answer58)
Green plants constitute [CPMT 1983, 84, 88; MP PMT 1999]
A)
First trophic level done
clear
B)
Second trophic level done
clear
C)
Third trophic level done
clear
D)
Complete food chain done
clear
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question_answer59)
An ecosystem is a complex interacting system of [JIPMER 1984; MP PMT 1984; AMU 1987]
A)
Individual done
clear
B)
Population done
clear
C)
Communities and their physical environment done
clear
D)
Communities and their soil conditions done
clear
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question_answer60)
Eutrophic lakes means [DPMT 1984]
A)
Lake poor in nutrients done
clear
B)
Lake rich in nutrients done
clear
C)
Lake poor in flora and fauna done
clear
D)
Lake lacking in water done
clear
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question_answer61)
First link in any food chain is a green plant because [RPMT 1985; CPMT 1985]
A)
Green plants can synthesize food done
clear
B)
They can eat everything done
clear
C)
Fixed at one place done
clear
D)
None of the above done
clear
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question_answer62)
The number of primary producer within a specified area would be maximum in [RPMT 1985; CPMT 1976; MP PMT 1995]
A)
Pond ecosystem done
clear
B)
Grassland done
clear
C)
Desert done
clear
D)
Forest ecosystem done
clear
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question_answer63)
Nepenthes is a [CPMT 1986, 90, 93; MP PMT 1995; BVP 2002]
A)
Primary producer done
clear
B)
Consumer done
clear
C)
Primary producer and consumer done
clear
D)
None of the above done
clear
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question_answer64)
Which one of the following components of ecosystem comes from outside [MP PMT 1987]
A)
Oxygen done
clear
B)
Temperature done
clear
C)
Insects done
clear
D)
Energy done
clear
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question_answer65)
An ecosystem resist change because it is in a state of [MP PMT 1987]
A)
Imbalance done
clear
B)
Homeostasis done
clear
C)
Shortage of components done
clear
D)
Deficiency of light done
clear
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question_answer66)
In an ecosystem, the population of [CBSE PMT 1988]
A)
Primary producers are more than that of primary consumers done
clear
B)
Secondary consumers are largest because they are powerful done
clear
C)
Primary consumers out number primary producers done
clear
D)
Primary consumers are least dependent upon primary producers done
clear
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question_answer67)
On the global basis the maximum productivity is shown by [MP PMT 1988; CPMT 2000]
A)
Aquatic ecosystem done
clear
B)
Grasslands done
clear
C)
Forests done
clear
D)
Deserts done
clear
View Solution play_arrow
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question_answer68)
Which of the following acts as 'nature's scavengers' [CBSE PMT 1997]
A)
Man done
clear
B)
Animals done
clear
C)
Insects done
clear
D)
Micro-organisms done
clear
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question_answer69)
The pyramid of number in a grassland ecosystem is [MP PMT 1998; BHU 2002]
A)
Always erect done
clear
B)
Always inverted done
clear
C)
Either erect or inverted done
clear
D)
Irregular done
clear
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question_answer70)
Cyberviatic is associated with [Pb. PMT 1999; RPMT 1999]
A)
Flow of energy done
clear
B)
Cycle of energy done
clear
C)
Energy released done
clear
D)
Study of energy done
clear
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question_answer71)
Which is the correct sequence in the food chain in a grassland [MP PMT 1990; AFMC 1999; Pb. PMT 2004; HP PMT 2005]
A)
Grass ® wolf ® deer ® buffalo done
clear
B)
Bacteria ® grass ® rabbit ® wolf done
clear
C)
Grass ® insect ® birds ® snakes done
clear
D)
Grass ® snake ® insect ® deer done
clear
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question_answer72)
Generally the food chain has how many trophic levels [MP PMT 1990, 2001, 02; BHU 2001]
A)
One done
clear
B)
Two done
clear
C)
Three or Four done
clear
D)
Three done
clear
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question_answer73)
In an ecosystem which of the following are important components [MP PMT 1992]
A)
Energy flow and food chain done
clear
B)
Mineral recycling and energy flow done
clear
C)
Food chain and decomposers done
clear
D)
All the above done
clear
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question_answer74)
Among the following, what happens in abiotic components of an ecosystem [CPMT 1990]
A)
Flow of energy done
clear
B)
Cycling of materials done
clear
C)
Consumer done
clear
D)
Flow of energy and cycling of material done
clear
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question_answer75)
The maximum biological magnification of DDT through food web is seen in [MP PMT 1992]
A)
Algae done
clear
B)
Bacteria done
clear
C)
Higher plants done
clear
D)
Man done
clear
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question_answer76)
The pyramid that cannot be inverted in a stable ecosystem, is pyramid of [CPMT 1991, 99, 2001, 02; MP PMT 2001, 02; KCET 2000; HP PMT 2005; Orissa JEE 2005]
A)
Number done
clear
B)
Energy done
clear
C)
Biomass done
clear
D)
All the above done
clear
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question_answer77)
Snake generally belongs to [CPMT 1991]
A)
Saprophytes done
clear
B)
Primary consumer done
clear
C)
Second trophic level done
clear
D)
None of these done
clear
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question_answer78)
In an ecosystem decomposer include [CPMT 1991]
A)
Bacteria and fungi done
clear
B)
Only microscopic organisms done
clear
C)
Above two done
clear
D)
Above two plus macro-organisms done
clear
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question_answer79)
Flow of energy declines from low to higher trophic level in ecosystem, is mainly explained by [CPMT 1991; MP PMT 1999]
A)
First law of thermodynamics done
clear
B)
Second law of thermodynamics done
clear
C)
Both of these done
clear
D)
None of the above done
clear
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question_answer80)
Driving force of an ecosystem is [CPMT 1991]
A)
Producer done
clear
B)
Carbohydrates in plants done
clear
C)
Biomass done
clear
D)
Solar energy done
clear
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question_answer81)
The total energy fixed by a gram plant (Cicer arietinum) in an ecosystem on the whole is called [CPMT 1991]
A)
Primary production done
clear
B)
Gross production done
clear
C)
Secondary production done
clear
D)
None of the above done
clear
View Solution play_arrow
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question_answer82)
Which of the following is correct sequence in food chain [CBSE PMT 1991]
A)
Fallen leaves ® bacteria ® insect larvae ® birds done
clear
B)
Phytoplankton ® zooplankton ® fish done
clear
C)
Grasses ® fox ® rabbit done
clear
D)
Grasses ® chameleon ® insects ® birds done
clear
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question_answer83)
The transfer of energy from organism to organism in a natural community establishes [CPMT 1988]
A)
Food chains done
clear
B)
Biological control done
clear
C)
Natural barriers done
clear
D)
All the above done
clear
View Solution play_arrow
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question_answer84)
With regard to ecological food chain, man is a [CPMT 1980]
A)
Producer done
clear
B)
Consumer done
clear
C)
Both producer and consumer done
clear
D)
Producer and decomposer done
clear
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question_answer85)
If phytoplankton are destroyed in the sea, then [DPMT 1984]
A)
Algae will get more space to grow done
clear
B)
Primary consumers will grow luxuriently done
clear
C)
It will affect the food chain done
clear
D)
No effect will be seen done
clear
View Solution play_arrow
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question_answer86)
An ecosystem must have continuous external source of [NCERT 1982]
A)
Food done
clear
B)
Minerals done
clear
C)
Energy done
clear
D)
All of the above done
clear
View Solution play_arrow
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question_answer87)
The word ??ecosystem?? was first coined by [CPMT 1989, 2002; 1995; MP PMT 1997, 2001; BHU 2002]
A)
Weaver and Clements done
clear
B)
A.G. Tansley done
clear
C)
E.P. Odum done
clear
D)
By all the above done
clear
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question_answer88)
Trophic levels are formed by [CPMT 1980, 2000; BHU 1984]
A)
Organisms linked in food chain done
clear
B)
Only plants done
clear
C)
Only animals done
clear
D)
Only carnivores done
clear
View Solution play_arrow
-
question_answer89)
In a food chain herbivores are [CPMT 1984; MHCET 2001; BVP 2001]
A)
Primary producers done
clear
B)
Primary consumers done
clear
C)
Secondary consumers done
clear
D)
Decomposers done
clear
View Solution play_arrow
-
question_answer90)
In a food chain of grassland ecosystem, the top consumers are [NCERT 1979]
A)
Carnivores done
clear
B)
Herbivores done
clear
C)
Either carnivores or herbivores done
clear
D)
Bacteria done
clear
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question_answer91)
Biological equilibrium is an equilibrium among the [CPMT 1981, 84, 85;MP PMT 1984]
A)
Producers done
clear
B)
Producers and consumers done
clear
C)
Decomposers and producers done
clear
D)
Producers, consumers and decomposers done
clear
View Solution play_arrow
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question_answer92)
In a tree ecosystem, the pyramid of number is [CPMT 1983; RPMT 1997]
A)
Upright done
clear
B)
Inverted done
clear
C)
Both of the above done
clear
D)
None of the above done
clear
View Solution play_arrow
-
question_answer93)
Largest ecosystem of the world are [AIIMS 1985; MHCET 2000]
A)
Grasslands done
clear
B)
Great lakes done
clear
C)
Oceans done
clear
D)
Forests done
clear
View Solution play_arrow
-
question_answer94)
Energy storage at consumer level is called [MP PMT 1990; 2001]
A)
Gross primary productivity done
clear
B)
Secondary productivity done
clear
C)
Net primary productivity done
clear
D)
Net productivity done
clear
View Solution play_arrow
-
question_answer95)
Ecosystem is [CPMT 1991; MP PMT 2002; Orissa JEE 2005]
A)
Open done
clear
B)
Closed done
clear
C)
Both open and close done
clear
D)
Neither open nor closed done
clear
View Solution play_arrow
-
question_answer96)
What is maximum in a pond-ecosystem [RPMT 1992]
A)
Primary consumers done
clear
B)
Secondary consumers done
clear
C)
Producers done
clear
D)
Decomposers done
clear
View Solution play_arrow
-
question_answer97)
The pyramid of number is based on [CBSE PMT 1993]
A)
Unit per area done
clear
B)
Food per individual done
clear
C)
Individuals in trophic level done
clear
D)
None of these done
clear
View Solution play_arrow
-
question_answer98)
If the plant producer dies in the ecosystem, then the system is [DPMT 1992]
A)
Seriously affected done
clear
B)
Cannot produce food done
clear
C)
Can have more producers done
clear
D)
Hardly affected done
clear
View Solution play_arrow
-
question_answer99)
The phytoplankton in the ponds act as [DPMT 1992]
A)
Producers done
clear
B)
Decomposers done
clear
C)
Consumers done
clear
D)
Organic compounds done
clear
View Solution play_arrow
-
question_answer100)
The character of an ecosystem is determined by the environmental factor which is shortest supply. This is the [CBSE PMT 1994]
A)
Law of minimum done
clear
B)
Law of diminishing returns done
clear
C)
Law of limiting factors done
clear
D)
Law of supply and demand done
clear
View Solution play_arrow
-
question_answer101)
Which must be preserved in an ecosystem, if the system is to be maintained [JIPMER 1994; Kerala PMT 2004]
A)
Producers and carnivores done
clear
B)
Producers and decomposers done
clear
C)
Carnivores and decomposers done
clear
D)
Herbivores and carnivores done
clear
View Solution play_arrow
-
question_answer102)
The importance of ecosystem lies in [MP PMT 1993, 95, 98]
A)
Cycling of materials done
clear
B)
Flow of energy done
clear
C)
Both the above done
clear
D)
None of the above done
clear
View Solution play_arrow
-
question_answer103)
Ecosystem has two components [MP PMT 1993, 98, 99; BHU 2000]
A)
Plants and animals done
clear
B)
Weeds and trees done
clear
C)
Biotic and abiotic done
clear
D)
Frog and men done
clear
View Solution play_arrow
-
question_answer104)
Ecosystem creates [MP PMT 1993]
A)
Food chain done
clear
B)
Food web done
clear
C)
Both the above done
clear
D)
None of the above done
clear
View Solution play_arrow
-
question_answer105)
In lake ecosystem, pyramid biomass is [MP PMT 1993; Bihar 2005]
A)
Upright done
clear
B)
Inverted done
clear
C)
Anything is possible done
clear
D)
None is correct done
clear
View Solution play_arrow
-
question_answer106)
In forest ecosystem, pyramid of number is [MP PMT 1993]
A)
Upright done
clear
B)
Inverted done
clear
C)
Any of the two done
clear
D)
None of the above done
clear
View Solution play_arrow
-
question_answer107)
Carnivores are [MP PMT 1993]
A)
Usually primary consumers done
clear
B)
Usually secondary consumers done
clear
C)
Usually secondary or tertiary consumers done
clear
D)
Usually decomposers rather than consumers done
clear
View Solution play_arrow
-
question_answer108)
The trophic level of lion in a forest ecosystem is [MP PMT 1994]
A)
B)
C)
D)
View Solution play_arrow
-
question_answer109)
What energy percentage can be captured by the organisms of next trophic level [CBSE PMT 1999]
A)
20% done
clear
B)
30% done
clear
C)
90% done
clear
D)
10% done
clear
View Solution play_arrow
-
question_answer110)
In a pond if there is too much wastage, then the BOD of pond will [CPMT 1994]
A)
Increase done
clear
B)
Decrease done
clear
C)
Remain same done
clear
D)
a and b both done
clear
View Solution play_arrow
-
question_answer111)
Which of the following abundantly occurs in pond ecosystem [RPMT 1995]
A)
Producer done
clear
B)
Consumer done
clear
C)
Top consumer done
clear
D)
Decomposers done
clear
View Solution play_arrow
-
question_answer112)
If all decomposers are removed from an ecosystem, what will happen [RPMT 1995]
A)
All consumers will die done
clear
B)
Energy cycle will be affected done
clear
C)
Balance of biogeochemical cycle will be disturbed done
clear
D)
Only herbivores will die done
clear
View Solution play_arrow
-
question_answer113)
Which of the following is the most stable ecosystem [CBSE PMT 1995; BHU 2002; MP PMT 2000]
A)
Mountain done
clear
B)
Desert done
clear
C)
Forest done
clear
D)
Ocean done
clear
View Solution play_arrow
-
question_answer114)
In a biotic community, primary consumers are [CBSE PMT 1995; BVP 2001; MHCET 2001]
A)
Omnivores done
clear
B)
Carnivores done
clear
C)
Detritivores done
clear
D)
Herbivores done
clear
View Solution play_arrow
-
question_answer115)
Which of the following does not effect the forest ecosystem [Bihar MDAT 1995]
A)
Deforestation done
clear
B)
Soil erosion done
clear
C)
Climatic variation done
clear
D)
None of these done
clear
View Solution play_arrow
-
question_answer116)
The pyramid of energy in a forest ecosystem is [MP PMT 1994, 95, 97, 2002]
A)
Always upright done
clear
B)
Always inverted done
clear
C)
Both upright and inverted done
clear
D)
None of the above done
clear
View Solution play_arrow
-
question_answer117)
In an ecosystem, there is flow of energy at different trophic levels. This is as follows : [KCET 1994]
A)
Primary consumers - Tertiary consumers - Secondary consumers - Decomposers - Producers done
clear
B)
Producers - Primary consumers - Secondary consumers - Tertiary consumers - Decomposers done
clear
C)
Producers - Decomposers - Primary consumers - Tertiary consumers - Secondary consumers done
clear
D)
Producers - Primary consumers - Tertiary consumers - Secondary consumers - Decomposers done
clear
View Solution play_arrow
-
question_answer118)
We refer to the following as the food chain [KCET 1994]
A)
Large number of animals near a source of food done
clear
B)
Transfer of food energy from the green plants through a series of consumer organisms done
clear
C)
Large number of human beings forming a human chain near a source of food done
clear
D)
None of these done
clear
View Solution play_arrow
-
question_answer119)
In a food chain, lion is a [EAMCET 1995; MHCET 2003]
A)
Secondary consumer done
clear
B)
Primary consumer done
clear
C)
Tertiary consumer done
clear
D)
Secondary producer done
clear
View Solution play_arrow
-
question_answer120)
In a pond ecosystem, benthos means [EAMCET 1995; BHU 2000, 01; AFMC 2001; MHCET 2003]
A)
Primary consumers in the depth of a pond done
clear
B)
Zooplankton on the water surface done
clear
C)
Periphyton done
clear
D)
Epineuston done
clear
View Solution play_arrow
-
question_answer121)
Transfer of energy from one trophic level to other trophic level is according to the second law of thermodynamics. The efficiency of energy transfer from herbivorous to carnivorous is [CBSE PMT 1996; AIEEE 2004]
A)
25% done
clear
B)
50% done
clear
C)
10% done
clear
D)
5% done
clear
View Solution play_arrow
-
question_answer122)
In a food chain, which of the following produces in the largest amount [CBSE PMT 1996]
A)
Producers done
clear
B)
Decomposers done
clear
C)
Tertiary consumers done
clear
D)
Primary consumers done
clear
View Solution play_arrow
-
question_answer123)
If forest area is reduced to half, which one of the following will be a long term effect [CBSE PMT 1996]
A)
The natives (tribals) of that area will die on account of hunger done
clear
B)
Cattles of that area will die due to scarcity of fodder done
clear
C)
To diversity in germplasm will effect the crop breeding done
clear
D)
It will be converted into large desert done
clear
View Solution play_arrow
-
question_answer124)
The first link in any food chain is always a green plant because [MP PMT 1996, 99]
A)
They are widely distributed done
clear
B)
They are firmly fixed to the soil done
clear
C)
D)
All of the above done
clear
View Solution play_arrow
-
question_answer125)
Food levels in an ecosystem are called [MP PMT 1996]
A)
Trophic levels done
clear
B)
Consumer levels done
clear
C)
Producer levels done
clear
D)
Herbivore levels done
clear
View Solution play_arrow
-
question_answer126)
Which one of the following is a correct food chain [MP PMT 1996]
A)
Grasshopper ® Grass ® Snake ® Frog ® Eagle done
clear
B)
Grass ® Grasshopper ® Frog ® Snake ® Eagle done
clear
C)
Eagle ® Snake ® Grasshopper ® Grass ® Frog done
clear
D)
Frog ® Snake ® Eagle ® Grasshopper ® Grass done
clear
View Solution play_arrow
-
question_answer127)
The correct path of energy flow in an ecosystem is [MP PMT 1995, 2002]
A)
Producers ® Carnivores ® Herbivores ® Decomposers done
clear
B)
Producers ® Herbivores ® Carnivores ® Decomposers done
clear
C)
Herbivores ® Carnivores ® Producers ® Decomposers done
clear
D)
Herbivores ® Producers ® Carnivores ® Decomposers done
clear
View Solution play_arrow
-
question_answer128)
Which of the following ecosystem has the highest gross primary productivity [CBSE PMT 1997, 2004]
A)
Grassland done
clear
B)
Coral reef done
clear
C)
Mangroves done
clear
D)
Rain forest done
clear
View Solution play_arrow
-
question_answer129)
Biological equilibrium is found among the [MP PMT 1998; MHCET 2003]
A)
Producer plants done
clear
B)
Consumers and producers done
clear
C)
Decomposers done
clear
D)
Producers, consumers and decomposers done
clear
View Solution play_arrow
-
question_answer130)
The food chain in which microbes split energy rich compounds of the producer community is [AIIMS 1999]
A)
Parasitic food chain done
clear
B)
Detritus food chain done
clear
C)
Predators food chain done
clear
D)
Producer food chain done
clear
View Solution play_arrow
-
question_answer131)
In an ecosystem bacteria are considered as [MP PMT 1997]
A)
Microconsumers done
clear
B)
Macroconsumers done
clear
C)
Primary consumers done
clear
D)
Secondary consumers done
clear
View Solution play_arrow
-
question_answer132)
A lake ecosystem is [MP PMT 1997]
A)
Artificial done
clear
B)
Abiotic done
clear
C)
Natural done
clear
D)
Hydrological done
clear
View Solution play_arrow
-
question_answer133)
Ecological pyramids are of [MP PMT 1997]
A)
Two types done
clear
B)
Three types done
clear
C)
Four types done
clear
D)
Five types done
clear
View Solution play_arrow
-
question_answer134)
To eat and be eaten relationship is called as [RPMT 1997]
A)
Food chain done
clear
B)
Food web done
clear
C)
Symbiosis done
clear
D)
Phagocytosis done
clear
View Solution play_arrow
-
question_answer135)
Which of the following ecosystems would be most stable [RPMT 1997]
A)
Man made forest done
clear
B)
Fresh water lake done
clear
C)
Saline lake done
clear
D)
Natural forest done
clear
View Solution play_arrow
-
question_answer136)
The living organisms of all ecosystems collectively consitute [RPMT 1997]
A)
Producers done
clear
B)
Decomposers done
clear
C)
Consumers done
clear
D)
Biosphere done
clear
View Solution play_arrow
-
question_answer137)
The number of individuals of a species in a particular ecosystem at a given time remains constant due to [MP PMT 1998]
A)
Man done
clear
B)
Parasites done
clear
C)
Predators done
clear
D)
Available food done
clear
View Solution play_arrow
-
question_answer138)
Ecosystem may be defined as [MP PMT 1999]
A)
Group of plants which act as the energy suppliers done
clear
B)
Group of organisms which form population done
clear
C)
Functional unit for ecological studies done
clear
D)
None of these done
clear
View Solution play_arrow
-
question_answer139)
Which of the following habitats is most unsuitable for primary productivity [MP PMT 1999]
A)
Meadow done
clear
B)
Forested river bank done
clear
C)
Cave done
clear
D)
Pond done
clear
View Solution play_arrow
-
question_answer140)
In an ecosystem in abiotic components which of the following occur [MP PMT 1999]
A)
Flow of energy done
clear
B)
Cycling of materials done
clear
C)
Consumers done
clear
D)
Flow of energy and cycling of materials done
clear
View Solution play_arrow
-
question_answer141)
The transfer or energy from organisms to organisms in a natural community establishes [MP PMT 1999]
A)
Food chains done
clear
B)
Biological control done
clear
C)
Natural barriers done
clear
D)
All the above done
clear
View Solution play_arrow
-
question_answer142)
The snakes are included under [MP PMT 1999]
A)
Saprophytes done
clear
B)
Primary consumers done
clear
C)
Second trophic level done
clear
D)
None of these done
clear
View Solution play_arrow
-
question_answer143)
The zooplanktonic forms are [MP PMT 1999]
A)
Primary consumers done
clear
B)
Secondary consumers done
clear
C)
Carnivores done
clear
D)
Primary producers done
clear
View Solution play_arrow
-
question_answer144)
Energy transfer from one trophic level to other, in a food chain is [CBSE PMT 1999; BHU 2005]
A)
1% done
clear
B)
2% done
clear
C)
10% done
clear
D)
20% done
clear
View Solution play_arrow
-
question_answer145)
The maximum biomagnification would be in which of the following in case of aquatic ecosystem [CBSE PMT 1999]
A)
Fishes done
clear
B)
Birds done
clear
C)
Zooplanktons done
clear
D)
Phytoplanktons done
clear
View Solution play_arrow
-
question_answer146)
The green plants are removed from an aquarium [KCET 1998]
A)
The fishes will not survive done
clear
B)
Fishes will increase in size done
clear
C)
Fishes will decrease in size done
clear
D)
None of the above done
clear
View Solution play_arrow
-
question_answer147)
Energy enters in ecosystem through [CPMT 1998]
A)
Herbivores done
clear
B)
Carnivores done
clear
C)
Producers done
clear
D)
Decomposers done
clear
View Solution play_arrow
-
question_answer148)
Ecosystem is defined as [CPMT 1998]
A)
Relation between plants and animals done
clear
B)
Relation between biotic and physical components done
clear
C)
Relation between producers and decomposers done
clear
D)
None of these done
clear
View Solution play_arrow
-
question_answer149)
Decomposers are [CPMT 1998; BHU 2001]
A)
Autotrophs done
clear
B)
Heterotrophs done
clear
C)
Autoheterotrophs done
clear
D)
Organotrophs done
clear
View Solution play_arrow
-
question_answer150)
In a terrestial ecosystem such as forest, maximum energy is in which trophic level [CBSE PMT 1998]
A)
B)
C)
D)
View Solution play_arrow
-
question_answer151)
The rate at which light energy is converted into chemical energy of organic molecules is the ecosystem's [CBSE PMT 1998; BHU 1999; Kerala CET 2003]
A)
Net primary productivity done
clear
B)
Gross secondary productivity done
clear
C)
Net secondary productivity done
clear
D)
Gross primary productivity done
clear
View Solution play_arrow
-
question_answer152)
The relationship in an ecosystem can be depicted in [AIIMS 1998]
A)
Pyramid of energy done
clear
B)
Pyramid of biomass done
clear
C)
Pyramid of numbers done
clear
D)
All of these done
clear
View Solution play_arrow
-
question_answer153)
Biomass pyramid of forest is [Pb. PMT 1999; RPMT 1999]
A)
Inverted done
clear
B)
Upright done
clear
C)
Infinite done
clear
D)
Finite done
clear
View Solution play_arrow
-
question_answer154)
In an aquatic ecosystem, maximum biomagnification is seen among the [CBSE PMT 1999]
A)
Fishes done
clear
B)
Phytoplanktons done
clear
C)
Zooplanktons done
clear
D)
Macroscopic plant done
clear
View Solution play_arrow
-
question_answer155)
The dominant second trophic level, in a lake ecosystem, is [BHU 1999]
A)
Benthos done
clear
B)
Plankton done
clear
C)
Zooplankton done
clear
D)
Phytoplankton done
clear
View Solution play_arrow
-
question_answer156)
A rat feeding upon potato tuber is [KCET 1999]
A)
Producer done
clear
B)
Carnivore done
clear
C)
Decomposer done
clear
D)
Primary consumer done
clear
View Solution play_arrow
-
question_answer157)
Tip of ecological pyramid is occupied by [MP PMT 1999; CBSE PMT 2001]
A)
Herbivores done
clear
B)
Carnivores done
clear
C)
Producers done
clear
D)
Decomposers done
clear
View Solution play_arrow
-
question_answer158)
The lentic ecosystem includes which of following water [KCET 2000]
A)
Rain done
clear
B)
Running done
clear
C)
Standing done
clear
D)
Gravitational done
clear
View Solution play_arrow
-
question_answer159)
Which of the following is source of energy to an ecosystem [MP PMT 2000]
A)
Solar energy done
clear
B)
Sugar stored done
clear
C)
Heat liberated during respiration done
clear
D)
ATP done
clear
View Solution play_arrow
-
question_answer160)
Food chain consists of [MP PMT 2000, 03]
A)
Producer, consumer and decomposer done
clear
B)
Producer, carnivore and decomposer done
clear
C)
Producer and primary consumer done
clear
D)
Producer, herbivore and carnivore done
clear
View Solution play_arrow
-
question_answer161)
Animals which live at the bottom of sea are [BVP 2000]
A)
Nekton done
clear
B)
Diatom done
clear
C)
Banthos done
clear
D)
Plankton done
clear
View Solution play_arrow
-
question_answer162)
Green plants are [BVP 2000]
A)
Autotrophs done
clear
B)
Heterotrophs done
clear
C)
Chemotrophs done
clear
D)
None of these done
clear
View Solution play_arrow
-
question_answer163)
Pyramid of energy is [BVP 2000]
A)
Upright done
clear
B)
Inverted done
clear
C)
Oblique done
clear
D)
None of these done
clear
View Solution play_arrow
-
question_answer164)
The flora and fauna in lakes or ponds are [AIIMS 2000]
A)
Lentic biota done
clear
B)
Lotic biota done
clear
C)
Abiotic biota done
clear
D)
Field layer done
clear
View Solution play_arrow
-
question_answer165)
During food chain the maximum energy is stored in [MHCET 2001; Pb. PMT 2004]
A)
Producers done
clear
B)
Decomposers done
clear
C)
Herbivores done
clear
D)
Carnivores done
clear
View Solution play_arrow
-
question_answer166)
Transition zone between two ecosystems or vegetational regions is termed [HP PMT 2005; Kerala CET 2005]
A)
Ecocline done
clear
B)
Ecotone done
clear
C)
Ecad done
clear
D)
Barrier done
clear
View Solution play_arrow
-
question_answer167)
The ecosystem consists of [AIIMS 2001; BVP 2001]
A)
Producers done
clear
B)
Consumers done
clear
C)
Decomposers done
clear
D)
All of these done
clear
View Solution play_arrow
-
question_answer168)
In a food chain, the total amount of living material is depicted by [BHU 2001]
A)
Pyramid of energy done
clear
B)
Pyramid of numbers done
clear
C)
Pyramid of biomass done
clear
D)
All of these done
clear
View Solution play_arrow
-
question_answer169)
The biotic part of ecosystem includes [BHU 2001]
A)
Producers done
clear
B)
Consumers done
clear
C)
Decomposers done
clear
D)
All of these done
clear
View Solution play_arrow
-
question_answer170)
When the number of organisms at successive levels are plotted, they assume the shape of a pyramid. This is called the pyramid of [CBSE PMT 2001; MHCET 2003]
A)
Energy done
clear
B)
Number done
clear
C)
Biomass done
clear
D)
Both a and c done
clear
View Solution play_arrow
-
question_answer171)
The two vegetation of ecosystem are separated by [CPMT 2001]
A)
Ecotone done
clear
B)
Ecoline done
clear
C)
Ecosystem done
clear
D)
Ecesis done
clear
View Solution play_arrow
-
question_answer172)
Energy enters into the ecosystem through [CBSE PMT 2001; CPMT 2003]
A)
Herbivores done
clear
B)
Carnivores done
clear
C)
Producers done
clear
D)
Decomposers done
clear
View Solution play_arrow
-
question_answer173)
Which of the following is an artificial ecosystem [MP PMT 2001]
A)
Rice-field done
clear
B)
Forest done
clear
C)
Grassland done
clear
D)
Lake done
clear
View Solution play_arrow
-
question_answer174)
Which are the biotic components of forest ecosystem [MP PMT 2001]
A)
Producers done
clear
B)
Decomposers done
clear
C)
Consumers done
clear
D)
All of the above done
clear
View Solution play_arrow
-
question_answer175)
Which of the following is most important abiotic factor in pond ecosystem [MHCET 2001]
A)
Water done
clear
B)
Phytoplankton done
clear
C)
Zooplankton done
clear
D)
Temperature done
clear
View Solution play_arrow
-
question_answer176)
The bacteria that attack dead organic matter are [MHCET 2001]
A)
Producer done
clear
B)
Herbivore done
clear
C)
Carnivores done
clear
D)
Decomposers done
clear
View Solution play_arrow
-
question_answer177)
10% law of flow of energy in ecosystem was proposed by [MHCET 2001]
A)
Lindemann done
clear
B)
Carl Mobius done
clear
C)
Tensely done
clear
D)
Darwin done
clear
View Solution play_arrow
-
question_answer178)
A plant being eaten by a herbivorous which in turn is eaten by a carnivorous makes [CBSE PMT 2002]
A)
Food chain done
clear
B)
Food web done
clear
C)
Omnivorous done
clear
D)
Interdependent done
clear
View Solution play_arrow
-
question_answer179)
When peacock eats snakes which eat insects thriving on green plants, the peacock is [CPMT 2002]
A)
A primary consumer done
clear
B)
A primary decomposer done
clear
C)
Final decomposer done
clear
D)
The apex of food pyramid done
clear
View Solution play_arrow
-
question_answer180)
A pond is a [RPMT 2002; MHCET 2003]
A)
Biome done
clear
B)
Natural ecosystem done
clear
C)
Artificial ecosystem done
clear
D)
Community of plants and animals done
clear
View Solution play_arrow
-
question_answer181)
Source of energy in an ecosystem is [CPMT 2002]
A)
Sun done
clear
B)
ATP done
clear
C)
Sugar made by plants done
clear
D)
Green plant done
clear
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question_answer182)
Maximum biomass and variable organism are found in [Orissa PMT 2002]
A)
River done
clear
B)
Pond done
clear
C)
Lake done
clear
D)
Estuary done
clear
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question_answer183)
In food chain initial organisms are [MP PMT 2002]
A)
Top consumers done
clear
B)
Secondary consumers done
clear
C)
Primary consumers done
clear
D)
Photosynthates done
clear
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question_answer184)
In a food web, each successive trophic level has [BHU 2002]
A)
Increased total energy done
clear
B)
Less total energy content done
clear
C)
More total energy content done
clear
D)
Non estimated energy content done
clear
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question_answer185)
Which of the following food chain may not be directly dependent upon solar energy [CBSE PMT 2002]
A)
Grazing done
clear
B)
Detritus done
clear
C)
Soaking done
clear
D)
Depleting done
clear
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question_answer186)
A food chain starts with [BVP 2002; MP PMT 2004]
A)
Nitrogen fixing organisms done
clear
B)
Photosynthesis done
clear
C)
Respiration done
clear
D)
Decomposers done
clear
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question_answer187)
If bamboo plant is growing in a far forest then what will be its trophic level [CBSE PMT 2002]
A)
First done
clear
B)
Second done
clear
C)
Third done
clear
D)
Fourth done
clear
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question_answer188)
In forest ecosystem, fungi is grouped as [CPMT 2003]
A)
Producer done
clear
B)
Consumer done
clear
C)
Secondary consumer done
clear
D)
Decomposer done
clear
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question_answer189)
Which ecosystem shows maximum genetic diversity [AIEEE 2003]
A)
Coniferous forests done
clear
B)
Tropical rain forests done
clear
C)
Subtropical forests done
clear
D)
Temperate forests done
clear
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question_answer190)
When spontaneous process occurs then free energy of system [DPMT 2003]
A)
Decrease done
clear
B)
Increase done
clear
C)
Remains same done
clear
D)
Either can increase or decrease done
clear
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question_answer191)
The maximum biomass of living diatoms to be found in [AIEEE 2003]
A)
Marine pelagic habitats done
clear
B)
Moist soil and swamps done
clear
C)
Deep coastmines done
clear
D)
Salt lakes done
clear
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question_answer192)
If decomposers are removed what will happen ecosystem [BHU 2003]
A)
Energy cycle is stopped done
clear
B)
Mineral cycle is stopped done
clear
C)
Consumers cannot absorb solar energy done
clear
D)
Rate of decomposition of mineral increases done
clear
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question_answer193)
Inverted pyramid is found in [MHCET 2003; Manipal 2005]
A)
Biomass pyramid of aquatic system done
clear
B)
Energy pyramid of grassland done
clear
C)
Biomass pyramid of grassland done
clear
D)
Pyramid of number of aquatic system done
clear
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question_answer194)
Which of the food chains directly depends on solar radiations [MP PMT 2004]
A)
Predator done
clear
B)
Grazing done
clear
C)
Detritus done
clear
D)
None of these done
clear
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question_answer195)
Which of the following organism form the decomposers [BHU 2004]
A)
Pteris done
clear
B)
Bacteria done
clear
C)
Saprophytic fungi done
clear
D)
Both b and c done
clear
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question_answer196)
Which of the following supports a dense population of plankton and littoral vegetation [BHU 2004]
A)
Oligotrophic done
clear
B)
Eutrophic done
clear
C)
Lithotrophic done
clear
D)
Agroecotrophic done
clear
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question_answer197)
A man-made ecosystem is [BHU 2004]
A)
Less in diversity done
clear
B)
More in diversity done
clear
C)
Man does not make ecosystem done
clear
D)
More stable than natural ecosystem done
clear
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question_answer198)
Decomposers are [Pb. PMT 2004]
A)
Autotrophs done
clear
B)
Heterotrophs done
clear
C)
Organotrophs done
clear
D)
Autoheterotrophs done
clear
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question_answer199)
These belong to the catergory of primary consumers ... [KCET 2004]
A)
Snakes and frogs done
clear
B)
Water insects done
clear
C)
Eagle and snakes done
clear
D)
Insects and cattle done
clear
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question_answer200)
An ecosystem which can be easily damaged but can recover after some time if damaging effect stops will be having [CBSE PMT 2004]
A)
Low stability and low resilience done
clear
B)
High stability and high resilience done
clear
C)
Low stability and high resilience done
clear
D)
High stability and low resilience done
clear
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question_answer201)
Energy flow and energy transformations in living systems strictly conform to the [Kerala PMT 2004]
A)
Law of limiting factors done
clear
B)
Liebig's law of minimum done
clear
C)
Laws of thermodynamics done
clear
D)
Shelford's law of tolerance done
clear
E)
Biogenetic law done
clear
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question_answer202)
Bacteria and fungi in a forest ecosystem are generally [Kerala PMT 2004]
A)
Producers done
clear
B)
Decomposers done
clear
C)
Primary consumers done
clear
D)
Secondary consumers done
clear
E)
Tertiary consumers done
clear
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question_answer203)
Area where two ecosystems overlap each other [Kerala PMT 2004]
A)
Niche done
clear
B)
Ecotype done
clear
C)
Edge line done
clear
D)
Ecotone done
clear
E)
Corridor done
clear
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question_answer204)
In an ecosystem [AIEEE 2004]
A)
Cycling of energy and nutrients is a coupled process done
clear
B)
Cycling of energy is an independent process done
clear
C)
Movement of energy is unidirectional done
clear
D)
Macro and micronutrients cycle at the same pace done
clear
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question_answer205)
The Great Barrier Reef along the east coast of Australia can be categorised as [AIIMS 2004]
A)
Population done
clear
B)
Community done
clear
C)
Ecosystem done
clear
D)
Biome done
clear
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question_answer206)
In a food chain, the total amount of living material is depicted by [Pb. PMT 2004]
A)
Pyramid of biomass done
clear
B)
Pyramid of energy done
clear
C)
Pyramid of number done
clear
D)
Trophic levels done
clear
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question_answer207)
Given below is one of the types of ecological pyramids This type represents [AIIMS 2005]
A)
Pyramid of numbers in a grassland done
clear
B)
Pyramid of biomass in a fallow land done
clear
C)
Pyramid of biomass in a lake done
clear
D)
Energy pyramid in a spring done
clear
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