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Free Download as PDF of the detailed solutions for class 12 Biology from NCERT or CBSE text book as per exam pattern, to help you in day to day learning. We provide all important questions and answers from chapter Reproduction in Flowering Plants of Biology.
31
Fusion of two dissimilar gametes is known as
[1]
Fertilization
[2]
Autogamy
[3]
Allogamy
[4]
Dichogamy
32
Cauliflory is flowers produced
[1]
on old dormant bud
[2]
on young bud
[3]
on the axil
[4]
on the branch
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
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
39
In anatropous ovule what is the direction of micropyle?
[1]
Right
[2]
Downward
[3]
Upward
[4]
Left
40
Germ pore is the region where the exine is
[1]
Thin
[2]
Uniform
[3]
Think and Uniform
[4]
Absent
41
Banana plant develops from
[1]
Rhizome
[2]
Seed
[3]
Sucker
[4]
Stolon
42
Sporopollenin is chemically
[1]
Protein
[2]
Heteropolysaccharide
[3]
Fatty substance
[4]
Homopolysaccharide
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
45
Which type of association is found in between entomophilous flower and pollinating agent?
[1]
Cooperation
[2]
Commensalism
[3]
Mutualism
[4]
Coevolution
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