Wind pollination is common in

(1) lilies

(2) grasses

(3) orchids

(4) legumes

Subtopic:  Pollination & Outbreeding Devices |
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Nucellar polyembryony is reported in species of

(1) Gossypium

(2) Triticum

(3) Brassica

(4) Citrus

Subtopic:  Apomixis & Polyembryony |
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In which one of the following pollination is autogamous?

(1) Xenogamy

(2) Chasmogamy

(3) Cleistogamy

(4) Geitonogamy

Subtopic:  Pollination & Outbreeding Devices |
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Apomictic embryos in Citrus arise from

(1) synergids

(2) maternal sporophytic tissue in ovule

(3) antipodal cells

(4) diploid egg

Subtopic:  Apomixis & Polyembryony |
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Transfer of pollen grains from the anther to the stigmaof another flower of the same plant is called

(1) xenogamy

(2) geitonogamy

(3) karyogamy

(4) autogamy

Subtopic:  Pollination & Outbreeding Devices |
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Wind pollinated flowers are

(1) small, brightly coloured, producing large number of pollen grains

(2) small, producing large number of dry pollen grains

(3) large, producing abundant nectar and pollen

(4) small, producing nectar and dry pollen

Subtopic:  Pollination & Outbreeding Devices |
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Which one of the following pairs of plant strucutre has haploid number of chromosomes?

(1) Megaspore mother cell and antipodal cells

(2) Egg cell and antipodal cells

(3) Nucellus and antipodal cells

(4) Egg nucleus and secondary nucleus

Subtopic:  Pistil: Female Gametophyte |
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Endosperm is consumed by developing embryo in the seed of

(1) coconut

(2) castor

(3) pea

(4) maize

Subtopic:  Seed |
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What does the filiform apparatus do at the entrance into ovule?

(1) It helps in the entry of pollen tube into a synergid

(2) It prevents entry of more than one pollen tube into the embryo sac

(3) It brings about opening of the pollen tube

(4) It guides pollen tube from a synergid to egg

Subtopic:  Pistil: Female Gametophyte |
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Which one of the following is resistant to enzyme action?

(1) Cork

(2) Wood fibre

(3) Pollen exine

(4) Leaf cuticle

Subtopic:  Stamen: Male Gametophyte |
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