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Sexual Reproduction in Flowering Plants — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYSexual Reproduction in Flowering Plants4 Marks
Question
(i) Define the cross-pollination.
(ii) Give one example each of aluminious, exalbuminous, perispermic seeds.
(iii) Draw a well labelled diagram showing the growth of pollen tube in longitudinal section of pistil.
✓

Answer

(i) The trnasfer of pollen grain from anther to stigma of flowers of different plants of the same species or different species.
(ii) Aluminious seeds—Wheat, maizeEx-albuminous seeds—Pea, groundnut Perispermic seeds—black peper, sugar beet.
(iii) Diagram : Growth of pollen tube in longitudinal section of pisti
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