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

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Questions
1 A bisexual flower which never opens up in its life span is known as
1 Autogamy
2 Allogamy
3 Homogamy
4 Cleistogamy

Answer: Cleistogamy
2 In angiosperms embryo sac represents:
1 Male gametophyte
2 Sporophytes
3 Female gametophyte
4 None of these

Answer: Female gametophyte
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3 Fibrous thickenings of hygroscopic nature are found in this part of the anther wall:
1 Middle layers
2 Epidermis
3 Endothecium
4 Tapetum

Answer: Endothecium
4 In the fully organized polygonum type of embryo sac, what is the ratio of haploid, diploid and triploid nuclei?
1 6 : 1 : 0
2 6 : 0 : 1
3 3 : 1 : 3
4 3 : 2 : 3

Answer: 6 : 1 : 0
5 An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is
1 Lignin
2 Cellulose
3 Cuticle
4 Sporopollenin

Answer: Sporopollenin
6 Fertilization in which male gametes are carried through pollen tube is known as
1 Porogamy
2 Syngamy
3 Siphonogamy
4 Chalazogamy

Answer: Siphonogamy
7 The coconut water and the edible part of coconut are equivalent to
1 Mesocarp
2 Embryo
3 Endosperm
4 Endocarp

Answer: Endosperm
8 Vernalisation stimulates flowering in
1 Turmeric
2 Carrot
3 Elephant yam
4 Ginger

Answer: Carrot
9 8-nucleate embryosacs are
1 monosporic only
2 bisporic only
3 tetrasporic only
4 any of these

Answer: any of these
10 A monocarpic plant is one which
1 has only one carpel
2 produces only one seed
3 flowers and fruits only once in life time and thereafter dies
4 none of these

Answer: flowers and fruits only once in life time and thereafter dies
11 In nature, cleistogamous flowers are
1 wind pollinated
2 insect pollinated
3 self pollinated
4 bird pollinated

Answer: self pollinated
12 The gynoecium consists of many free pistils in flowers of
1 Papaver
2 Aloe
3 Tomato
4 Michelia

Answer: Michelia
13 Double fertilization involves
1 Fusion of secondary nucleus with one male gamete
2 Fusion of secondary nucleus with both male gametes
3 Fusion of one polar nucleus with one male gamete
4 Any of above, depending on species

Answer: Fusion of secondary nucleus with one male gamete
14 Filliform apparatus is found in
1 Anther wall
2 Synergids
3 Egg cell
4 Secondary nucleus

Answer: Synergids
15 Which one of the following is surrounded by a callose wall?
1 Male gamete
2 Pollen grain
3 Egg
4 Microspore mother cell

Answer: Microspore mother cell

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