NCERT Solution – Biology Questions and Answers of Class 12 - Reproduction in Flowering Plants

Questions

76 Pick out the wrong statement.

1 Sequoia, a gymnosperm, is one of the tallest trees

2 Phaeophyceae members possess chlorophyll a, c, carotenoids and xanthophylls

3 Double fertilization is unique to gymnosperms and monocotyledons

4 Moss is gametophyte which consists of two stages namely, protonema stage and leafy stage

View Answer

Answer: Double fertilization is unique to gymnosperms and monocotyledons

77 Male gametes in angiosperms are formed by the division of:

1 Generative cell

2 Microspore

3 Microspore mother cell

4 Vegetative cell

View Answer

Answer: Generative cell

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78 In an angiosperm, male plant is diploid and female plant tetraploid, endosperm will be

1 Haploid

2 Triploid

3 Tetraploid

4 pentaploid

View Answer

Answer: pentaploid

79 Anemophillous flowers have

1 Sessile stigma

2 Small smooth stigma

3 Coloured flower

4 Large feathery stigma

View Answer

Answer: Large feathery stigma

80 Endosperm of angiosperms results after fertilization from

1 Synergids

2 Secondary nucleus

3 Antipodal cells

4 Egg

View Answer

Answer: Secondary nucleus

81 The aleurone layer in maize grain is specially rich in:

1 Lipids

2 Starch

3 Proteins

4 Auxins

View Answer

Answer: Starch

82 The arrangement of the nuclei in a normal embryo sac in the dicot plants is

1 2 + 3 + 3

2 2 + 4 + 2

3 3 + 3 + 2

4 3 + 2 + 3

View Answer

Answer: 3 + 2 + 3

83 Double fertilization was first discovered by Nawaschin (1898) in

1 Lilium and Fritillaria

2 Mango and Sugarcane

3 Papaya and Pea

4 Brassica and Candytuft

View Answer

Answer: Lilium and Fritillaria

84 Insect pollinated flowers are characterized by

1 large number of pollens

2 dry and smooth pollens

3 sticky and rough pollens

4 Heavy pollens

View Answer

Answer: sticky and rough pollens

85 Anthesis is

1 Opening of flower bud

2 Pollen mother cell undergoes meiosis

3 Dehiscence of anthers

4 Stigma becoming receptive

View Answer

Answer: Opening of flower bud

86 Apomictic embryos in citrus arise from

1 Maternal sporophytic tissue in ovule

2 Synergids

3 Diploid egg

4 Antipodal cells

View Answer

Answer: Maternal sporophytic tissue in ovule

87 Endosperm is formed during the double fertilization by:

1 Ovum and male gamete

2 One polar nuclei and one male gamete

3 Two polar nuclei and one male gamete

4 Two polar nuclei and two male gametes

View Answer

Answer: Two polar nuclei and one male gamete

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