NCERT - Reproduction in Flowering Plants Questions & Answers of Class 12 Biology | GkSeries

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Questions
31 Fusion of two dissimilar gametes is known as
1 Fertilization
2 Autogamy
3 Allogamy
4 Dichogamy

Answer: Fertilization
32 Cauliflory is flowers produced
1 on old dormant bud
2 on young bud
3 on the axil
4 on the branch

Answer: on the branch
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33 A polygonum type of embryo sac is
1 7-celled and 8-nucleate
2 8-celled and 7-nucleate
3 7-celled and 7-nucleate
4 8-celled and 8-nucleate

Answer: 7-celled and 8-nucleate
34 In anther,meiosis occurs in :
1 Tapetal cells
2 Endothelial cells
3 Stomium cells
4 Pollen mother cells

Answer: Pollen mother cells
35 Which one of the following is not a correct explanation of cross pollination?
1 The pollen grains of male flowers are transferred to the stigma of the female flowers
2 The pollen grains are transferred from one flower to another flower, of another plant of the same species
3 The pollen grains are transferred from one flower to another flower situated on the same plant
4 The pollen grains of one flower are transferred to the stigma of the same flower

Answer: The pollen grains of one flower are transferred to the stigma of the same flower
36 Plants with ovaries having only one or a few ovules, are generally pollinated by
1 Wind
2 Bees
3 Butterflies
4 Birds

Answer: Wind
37 Embryo sac is called monosporic when it develops from
1 One of the megaspores out of the four megaspores which are derived from division of megaspore mother cell
2 All the four megaspores
3 Three megaspores
4 Only from two functional megaspores

Answer: One of the megaspores out of the four megaspores which are derived from division of megaspore mother cell
38 In a fully developed male gametophyte,no of nuclei is :
1 One
2 Two
3 Three
4 Four

Answer: Three
39 In anatropous ovule what is the direction of micropyle?
1 Right
2 Downward
3 Upward
4 Left

Answer: Downward
40 Germ pore is the region where the exine is
1 Thin
2 Uniform
3 Think and Uniform
4 Absent

Answer: Absent
41 Banana plant develops from
1 Rhizome
2 Seed
3 Sucker
4 Stolon

Answer: Sucker
42 Sporopollenin is chemically
1 Protein
2 Heteropolysaccharide
3 Fatty substance
4 Homopolysaccharide

Answer: Fatty substance
43 Which one of the following pairs of plant structures has haploid number of chromosomes?
1 Egg cell and antipodal cells
2 Megaspore mother cell and antipodal cells
3 Egg nucleus and secondary nucleus
4 Nucellus and antipodal cells

Answer: Egg cell and antipodal cells
44 Allogamy is best favoured by
1 Dichogamy
2 Dicliny
3 Cleistogamy
4 Homogamy

Answer: Dichogamy
45 Which type of association is found in between entomophilous flower and pollinating agent?
1 Cooperation
2 Commensalism
3 Mutualism
4 Coevolution

Answer: Mutualism

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