CBSE - Reproduction in Flowering Plants MCQs | CBSE Solution of Class 12 Biology Reproduction in Flowering Plants

Questions

61 In Angiosperms pollen tube liberate their male gametes into the:

1 Egg cell

2 Antipodal cells

3 Central cell

4 Synergids

View Answer

Answer: Synergids

62 The Pollengrain is related to the embryo sac as:

1 Male gametophyte is to the egg

2 Sperm is to egg

3 Male gametophyte is to Female gametophyte

4 All of these

View Answer

Answer: Male gametophyte is to Female gametophyte

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63 Grafting is successful in dicots but not in monocots because the dicots have:

1 cork cambium

2 vascular bundles arranged in a ring

3 vessels with elements arranged end to end

4 cambium for secondary growth

View Answer

Answer: cambium for secondary growth

64 If any somatic cell of sporophyte produces gametophyte without reduction division, it is

1 Parthenogenesis

2 Amphimixis

3 Apospory

4 Apogamy

View Answer

Answer: Apospory

65 Juvenile phase fail to flower because:

1 It is too strong

2 It does not respond to stimuli.

3 It is too weak

4 It is too weak

View Answer

Answer: It does not respond to stimuli.

66 Wind pollination is common in

1 Orchids

2 Legumes

3 Lilies

4 Grasses

View Answer

Answer: Grasses

67 Tapetum layer around the pollen sac is meant for :

1 Dehiscene

2 Protection

3 Fusion

4 Nutrition

View Answer

Answer: Nutrition

68 When the other floral parts are arranged at the base of the gynoecium, the flower is called :

1 Perigynous flower

2 Epigynous flower

3 Hypogynous flower

4 None of these

View Answer

Answer: Hypogynous flower

69 In which one pair both the plants can be vegetatively propagated by leaf pieces

1 Asparagus and Bryophyllum

2 Bryophyllum and Kalanchoe

3 Chrysanthemum and Agave

4 Agave and Kalanchoe

View Answer

Answer: Agave and Kalanchoe

70 An orthotropous ovule is one in which micropyle and chalaza are

1 parallel along with funicle

2 at right angles to funicle

3 parallel along with ovule

4 in straight line of funicle

View Answer

Answer: in straight line of funicle

71 Nucellar polyembryony is reported in species of

1 Brassica

2 Citrus

3 Gossypium

4 Triticum

View Answer

Answer:

72 In Agave, vegetative propagation is carried out through

1 Rhizome

2 Stolon

3 Bulbils

4 Sucker

View Answer

Answer: Bulbils

73 In which one of the following pollination is autogamous?

1 Cleistogamy

2 Geitonogamy

3 Xenogamy

4 Chasmogamy

View Answer

Answer: Chasmogamy

74 Filiform apparatus is a characteristic feature of

1 Zygote

2 Suspensor

3 Egg

4 Synergid

View Answer

Answer: Synergid

75 In a mature ovule,if helium is close to micropyle, then the ovule is called:

1 Orthotropous

2 Anatropous

3 Campylotropous

4 Hemitropous

View Answer

Answer: Anatropous

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