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question_answer1)
The techinique of parasexual fusion was first discovered by
A)
Harris and Watson done
clear
B)
Dudits done
clear
C)
Carlson done
clear
D)
Harris and Watkins done
clear
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question_answer2)
The diagram below shows a fertilized ovule and carpel
Which numbers represent the structures which will become? (i) The future embryo (ii) The future testa (iii) The future micropyle of the seeds
A)
(i) - 5 (ii) - 3 (iii) - 1 done
clear
B)
(i) - 7 (ii) - 8 (iii) - 4 done
clear
C)
(i) - 6 (ii) - 3 (iii) - 7 done
clear
D)
(i) - 5 (ii) - 2 (iii) - 4 done
clear
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question_answer3)
Chalazogamy is found in
A)
Cucurbita done
clear
B)
Sunflower done
clear
C)
Casurina done
clear
D)
Boerhavia done
clear
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question_answer4)
When the pollen tube enters through the micropyle, it is termed as [Manipal MEE 1995; CPMT 1999; MHCET 2001]
A)
Chalazogamy done
clear
B)
Mesogamy done
clear
C)
Porogamy done
clear
D)
None of the above done
clear
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question_answer5)
Female gametophyte of a typical dicot at the time of fertilization is [AFMC 1976; BHU 1980; CBSE PMT 1993; AIIMS 2000]
A)
8 celled done
clear
B)
7 celled done
clear
C)
6 celled done
clear
D)
4 celled done
clear
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question_answer6)
Syngamy means [CBSE PMT 1991]
A)
Fusion of similar spores done
clear
B)
Fusion of dissimilar spores done
clear
C)
Fusion of cytoplasm done
clear
D)
Fusion of gametes done
clear
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question_answer7)
Double fertilization was discovered by [CPMT 1990, 93, 96, 99; RPMT 1995; MP PMT 1999; BHU 2003]
A)
Karl Schnarf done
clear
B)
P. Maheshwari done
clear
C)
S.G. Nawaschin done
clear
D)
B.G.L. Swamy done
clear
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question_answer8)
When pollen tube enters by integuments, then the process is called [CPMT 1989, 91; MHCET 2000; MP PMT 2004]
A)
Mesogamy done
clear
B)
Porogamy done
clear
C)
Chalazogamy done
clear
D)
Pseudogamy done
clear
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question_answer9)
Double fertilization is a characteristic of [AFMC 1984; CPMT 1987, 93, 94; Bihar 1995; BHU 1999, 2000; Kerala CET 2003; MP PMT 2004]
A)
Gymnosperms done
clear
B)
Bryophytes done
clear
C)
Angiosperms done
clear
D)
Pteridophytes done
clear
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question_answer10)
Fertilization of egg takes place inside [DPMT 1993]
A)
Anther done
clear
B)
Stigma done
clear
C)
Pollen tube done
clear
D)
Embryo sac done
clear
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question_answer11)
Pollen tube at the time of entering embryo sac has [BHU 1976]
A)
Four gametes done
clear
B)
Three male gametes done
clear
C)
Two male gametes done
clear
D)
One gametic nucleus done
clear
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question_answer12)
When pollen tube enters through the funiculus or the base of the ovule, it is called as [CPMT 1986]
A)
Chalazogamy done
clear
B)
Mesogamy done
clear
C)
Isogamy done
clear
D)
Porogamy done
clear
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question_answer13)
The nuclei of the sperm and egg fuse as a result of [CBSE PMT 1990]
A)
Base pair relation of DNA and RNA done
clear
B)
Formation of hydrogen bonds done
clear
C)
Mutual attraction caused by differences in electrical charges done
clear
D)
Attraction of protoplasts of egg and sperm done
clear
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question_answer14)
Number of nuclei taking part in double fertilization is [MP PMT 1984; RPMT 1995; Kerala PMT 2004]
A)
2 done
clear
B)
3 done
clear
C)
4 done
clear
D)
5 done
clear
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question_answer15)
Fusion of two dissimilar gametes is called [DPMT 1986; DPMT 1993; AFMC 1996]
A)
Fertilization done
clear
B)
Pollination done
clear
C)
Self pollination done
clear
D)
Self fertilization done
clear
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question_answer16)
A pollen tube grows down the style because [CPMT 1993; AFMC 2002]
A)
It helps in fertilization done
clear
B)
It takes nutrients from the style done
clear
C)
Filiform apparatus of synergids attracts the pollen tube done
clear
D)
Of chemical attraction done
clear
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question_answer17)
The number of nuclei migrating from each of the micropylar quartet and chalazal quartet to the centre of the normal embryo sac is [AMU 1990]
A)
One done
clear
B)
Two done
clear
C)
Four done
clear
D)
Number not fixed done
clear
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question_answer18)
By double fertilization is formed [MP PMT 1994, 2000]
A)
Endosperm done
clear
B)
Megaspore done
clear
C)
Seed done
clear
D)
Fruit done
clear
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question_answer19)
Which one of the following events in a botanical garden is never directly influenced by light [CPMT 1988, 93]
A)
Flowering done
clear
B)
Photosynthesis done
clear
C)
Transpiration done
clear
D)
Fertilization done
clear
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question_answer20)
How much time is generally required/taken by the pine plant from pollination to fertilization [MP PMT 1995]
A)
Four months done
clear
B)
Thirteen months done
clear
C)
Two years done
clear
D)
Four years done
clear
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question_answer21)
The process of fusion between male nucleus and egg nucleus is called as [MP PMT 1995]
A)
Syngamy done
clear
B)
Triple fusion done
clear
C)
Double fertilization done
clear
D)
Conjugation done
clear
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question_answer22)
Double fertilization was first discovered by Nawaschin (1898) in [MP PMT 1997, 2003]
A)
Lilium and Fritillaria done
clear
B)
Mango and sugarcane done
clear
C)
Papaya and pea done
clear
D)
Brassica and Candytuft done
clear
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question_answer23)
The phenomenon of syngamy (fertilization) in angiosperms was discovered by [RPMT 1997; AFMC 2001]
A)
Svedberg done
clear
B)
Strasburger done
clear
C)
Nawaschin done
clear
D)
Coulter and Chamberlin done
clear
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question_answer24)
Germination of pollen grain on the stigma is [JIPMER 1987; BVP 2003]
A)
Autogamy done
clear
B)
In vivo germination done
clear
C)
In vitro germination done
clear
D)
None of these done
clear
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question_answer25)
In angiosperm, triple fusion is necessary for the formation of [CBSE PMT 1996]
A)
Seed coat done
clear
B)
Fruit wall done
clear
C)
Embryo done
clear
D)
Endosperm done
clear
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question_answer26)
In an angiospermic plant, endosperm is formed due to fertilization of secondary nucleus but it is absent in some of the seeds viz. pea, bean, phaseolus (moong) etc. It is due to lack of [MP PMT 1997]
A)
Certain enzymes done
clear
B)
Dicotyledonous hormone done
clear
C)
Growth hormone done
clear
D)
None of the above done
clear
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question_answer27)
Growth of pollen tube towards embryo sac is [AIIMS 2000; CPMT 2003]
A)
Geotropism done
clear
B)
Thigmotaxis done
clear
C)
Chemotaxis done
clear
D)
Phototaxis done
clear
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question_answer28)
Through which route the pollen tube enters the ovule [MP PMT 2001]
A)
Chalaza done
clear
B)
Micropyle done
clear
C)
Funiculus done
clear
D)
All of these done
clear
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question_answer29)
The cell that divides to form two male nuclei in angiosperms is [MHCET 2001]
A)
Vegetative cell done
clear
B)
Generative cell done
clear
C)
Tube cell done
clear
D)
Antheridial cell done
clear
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question_answer30)
Which of the following is without exception in angiosperms [CBSE PMT 2002]
A)
Secondary growth done
clear
B)
Presence of vessels done
clear
C)
Double fertilization done
clear
D)
Autotrophic nutrition done
clear
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question_answer31)
Pollen tube discharge its gametes in [CPMT 2003; CBSE PMT 2003]
A)
Synergids done
clear
B)
Antipodals done
clear
C)
Central cell done
clear
D)
None of these done
clear
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question_answer32)
The formation of embryo without fusion of gametes is termed, as [MP PMT 2003]
A)
Apospory done
clear
B)
Isogamy done
clear
C)
Apogamy done
clear
D)
Syngamy done
clear
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question_answer33)
Triple fusion in angiosperm is the fusion of second sperm with [Orissa JEE 2004]
A)
Antipodal cell and one synergid cell done
clear
B)
Two antipodal cells done
clear
C)
Two synergid cells done
clear
D)
Two polar nuclei done
clear
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question_answer34)
After fertilization the outer integument forms [MHCET 2004]
A)
Testa done
clear
B)
Tegmen done
clear
C)
Perisperm done
clear
D)
Pericarp done
clear
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question_answer35)
Triple fusion is characteristic of [Kerala PMT 2004]
A)
Thallophytes done
clear
B)
Bryophytes done
clear
C)
Pteridophytes done
clear
D)
Gymnosperms done
clear
E)
Angiosperms done
clear
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question_answer36)
The pollen tube usually enters the embryo sac [AIIMS 2004; CPMT 2005]
A)
Through one of the synergids done
clear
B)
By directly penetrating the egg done
clear
C)
Between one synergid and central cell done
clear
D)
By knocking off the antipodal cells done
clear
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question_answer37)
Double fertilization involves [AIIMS 2005]
A)
Fertilization of the egg by two male gametes done
clear
B)
Fertilization of two eggs in the same embryo sac by two sperms brought by one pollen tube done
clear
C)
Fertilization of the egg and the central cell by two sperms brought by different pollen tubes done
clear
D)
Fertilization of the egg and the central cell by two sperms brought by the same pollen tube done
clear
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question_answer38)
Which of the following is not true for double fertilization [BCECE 2005]
A)
Discovered by Nawaschin done
clear
B)
Male gamete and secondary nucleus fused to form Endosperm nucleus done
clear
C)
Endosperm nucleus is diploid done
clear
D)
Endosperm provide nutrition to embryo done
clear
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question_answer39)
Development of seed from an unfertilised egg is called [HP PMT 2005]
A)
Vivipary done
clear
B)
Parthenocarpy done
clear
C)
Apogamy done
clear
D)
Apospory done
clear
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question_answer40)
Double fertilisation results in the production of [J&K CET 2005]
A)
Haploid nucleus done
clear
B)
Diploid nucleus done
clear
C)
Triploid nucleus done
clear
D)
Tetraploid nucleus done
clear
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