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

Bihar BoardEnglish MediumSTD 12 ScienceBIOLOGYSexual Reproduction in Flowering Plants3 Marks
Question
Write two contrivances found in selfpollinated flower.
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Answer

Two contrivances found in self-pollinated flower are as given below :
(1) Bisexuality : Such flowers possess both male and female sex organs and hence promote selfpollination.
(2) Homogamy : When male and female sex organs develop and mature at the same time it favours self-pollination, e.g. Mirabilis, catharanthus.
(3) Cleistogamy : Those flowers which never open at all, are called cleistogamous flower hence these occurs only self-pollination in them as a rule e.g. viola, commelina, oxalis etc. 

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