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

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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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