Three lines (l, II and III) represent the relative population number of three different organisms where food is the only limiting factor to the carrying capacity (number of individuals). Which of the following best matches the three lines (I, II, 111) with the organisms 1 comprising each population given access to an unlimited food supply at time X ?
Given pie-diagram represents the relative contribution of various greenhouse gases (P, Q, R and S) to total global warming. Select the correct option regarding it.
A)
Increase in 'Q' concentration increases the rate of photosynthesis.
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B)
'R' are used in aerosols cans, jet fuel and as refrigerants in air conditioners.
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C)
'S' is produced by combustion of nitrogen rich fuels, livestock wastes and breakdown of nitrogen fertilisers in soil.
Assume the pedigree presented below to be straight forward, with no complication such as illegitimacy. Trait W, found in individuals represented by the shaded symbols, is rare in the population at large. State which of the following pattern of transmission for W are consistent with this pedigree?
Consider the following statements each with two blanks.
Seminiferous tubules produce (i) while Leydig's cells produce (ii).In females, urethra is small and conducts (iii) while in males it conducts urine and (iv).
The process of formation of spermatozoa from spermatogonia is called (v) and the process of maturation of spermatids into spermatozoa is called (vi).
Which one of the following options, gives the correct fill ups for the respective blank numbers from (i) to (vi) in the statements?
A)
(v)-spermatogenesis, (vi) - spermiogenesis, (i) - spermatozoa, (ii) ? testosterone
Read the given statements and select the correct option.
Statement-1: In insertional inactivation, blue colour produced by bacterial colonies indicates that the plasmid does not have an insert into the bacterial genome.
Statement-2: Presence of insert results into insertional inactivation of P-galactosidase enzyme and the colonies do not produce any colour.
A)
Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
doneclear
B)
Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
There are two opposing views about origin of modern man. According to one view Homo erectus in Asia were the ancestors of modern man. A study of variation of DNA however suggested African origin of modern man. What kind of observation on DNA variation could suggest this?
A)
Greater variation in Asia than in Africa
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B)
Greater variation in Africa than in Asia
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C)
Similar variation in Africa and Asia
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D)
Variation only in Asia and no variation in Africa.
The given graph represents how three different living organisms (X, Y and Z) cope with the external environmental conditions. Study the graph and select the correct option regarding X, Y and Z.