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

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

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

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

Answer: pentaploid
79 Anemophillous flowers have
1 Sessile stigma
2 Small smooth stigma
3 Coloured flower
4 Large feathery stigma

Answer: Large feathery stigma
80 Endosperm of angiosperms results after fertilization from
1 Synergids
2 Secondary nucleus
3 Antipodal cells
4 Egg

Answer: Secondary nucleus
81 The aleurone layer in maize grain is specially rich in:
1 Lipids
2 Starch
3 Proteins
4 Auxins

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

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

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

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

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

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

Answer: Two polar nuclei and one male gamete
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