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

Questions
46 A clone is a group of individuals obtained through
1 Self pollination
2 Vegetative propagation
3 Hybridization
4 Cross pollination

Answer: Vegetative propagation
47 Cleistogamous condition is present in
1 Brassica
2 Solanum tuberosum
3 Commelina
4 Allium cepa

Answer: Commelina
48 The pollen are liberated in Cassytha by:
1 Transverse dehiscence
2 Longitudinal dehiscence
3 Porous dehiscence
4 Valvular dehiscence

Answer: Valvular dehiscence
49 How many microspore mother cell will produce 1000 microspores?
1 100
2 250
3 200
4 500

Answer: 250
50 What is the collar like outgrowth developing fromthe base of the ovule and forming a sort of third integument?
1 Caruncle
2 Crona
3 Operculum
4 Aril

Answer: Aril
51 Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called
1 Geitonogamy
2 Xenogamy
3 Autogamy
4 Karyogamy

Answer: Geitonogamy
52 Which one of the following statements is wrong?
1 Intine is made up of cellulose and pectin
2 Vegetative cell is larger than generative cell
3 Pollen grains in some plants remain viable for months
4 When pollen is shed at two-celled stage, double fertilization does not take place

Answer: When pollen is shed at two-celled stage, double fertilization does not take place
53 There are 10 flowers in one individual plant of Crotalaria. In each microsporangium of every stamen of all the flowers, there are 30 microspore mother cells. How many pollen grains are formed from that plant?
1 4,000
2 10,000
3 48,000
4 24,000

Answer: 48,000
54 Egg apparatus consists of
1 Egg
2 Egg and antipodal cells
3 Egg and polar nuclei
4 Egg and synergids

Answer: Egg and polar nuclei
55 An interesting modification of flower shape for insect pollination occurs in some orchids in which a male insect mistakes the pattern on the orchid flower for the female of his species and tries to copulate with it, thereby pollinating the flower. This phenomenon is called
1 Pseudo parthenocarpy
2 Pseudo pollination
3 Pseudo copulation
4 Pseudocopulation

Answer: Pseudocopulation
56 Hypanthodium refers to a special type of
1 inflorescence
2 ovary
3 fruit
4 flower

Answer: inflorescence
57 Embryo sac is found in
1 Endosperm
2 Embryo
3 Seed
4 Ovule

Answer: Ovule
58 Double fertilization involves:
1 Fertilization of two eggs in the same embryo sac by two sperms brought by one pollen tube.
2 Fertilization of the egg by two male gametes
3 Fertilization of the egg and the central cell by two sperms brought by the same pollen tube
4 Fertilization of the egg and the central cell by two sperms brought by different pollen tubes.

Answer: Fertilization of the egg and the central cell by two sperms brought by the same pollen tube
59 In a flowering plant archesporium gives rise to
1 only the wall of the sporangium
2 wall and the tapetum
3 both wall and the sporogenous cells
4 only tapetum and sporogenous cells

Answer: both wall and the sporogenous cells
60 In which one of the following, male and female gametophytes do not have free living independent existence?
1 Polytrichum
2 Funaria
3 Cedrus
4 Pteris

Answer: Funaria

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