Ubisch bodies are secreted from

(1) ovule

(2) tapetum

(3) both of these

(4) none of these

Subtopic:  Stamen: Anther |
 74%
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Aleurone layer is

(1) haploid

(2) diploid

(3) triploid

(4) tetraploid

Subtopic:  Seed |
 73%
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Edible part of apple is the

(1) thalamus

(2) mesocarp

(3) epicarp

(4) endocarp

Subtopic:  Fruit |
 83%
From NCERT
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Pollination by bat is called

(1) ornithophily

(2) chitopteriphily

(3) malacophily

(4) anemophily

Subtopic:  Pollination & Outbreeding Devices | Post Pollination Events |
 66%
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During formation of which of the following free nuclear division occurs?

(1) Flower

(2) Endosperm

(3) Gametes

(4) Fruit

Subtopic:  Endosperm |
 93%
From NCERT
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Xenia and metaxenia terms are related with

(1) pollen culture

(2) xylem and phloem

(3) endosperm

(4) embryo

Subtopic:  Endosperm |
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Pollen grains are able to withstand extremes of temperature and dessication because their exine is composed of

(1) cutin

(2) suberin

(3) sporopollenin

(4) callose

Subtopic:  Stamen: Male Gametophyte |
 98%
From NCERT
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The pollen tube usually enters the embryo sac

(1) through one of the synergids

(2) by directly penetrating the egg

(3) between one synergid and central cell

(4) by knocking off the antipodal cells

Subtopic:  Post Pollination Events |
 88%
From NCERT
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Double fertilization involves

(1) fertilization of the egg by two male gametes

(2) fertilization of two eggs in the same embryo sac by two sperms brought by one pollen tube

(3) fertilization of the egg and the central cell by two sperms brought by different pollen tubes

(4) fertilization of the egg and the central cell by two sperms brought by the same pollen tube.

Subtopic:  Double Fertilization |
 78%
From NCERT
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Plants of which one of the following groups of genera are pollinated by the same agency?

(1) Triticum, Cocos, Mangifera

(2) Ficus, Kigelia, Casuarina

(3) Salvia, Morus, Euphorbia

(4) Bombax, Butea, Bauhinia

Subtopic:  Pollination & Outbreeding Devices |
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