Sexual Reproduction in Flowering Plants Question 24
24. Which one of the following statements is correct? [NEET Kar. 2013]
(a) Geitonogamy involves the pollen and stigma of flowers of different plants
(b) Cleistogamous flowers are always autogamous
(c) Xenogamy occurs only by wind pollination
(d) Chasmogamous flowers do not open at all
Show Answer
Answer : b
Hints & Solutions
(b) Cleistogamous flowers do not expose their reproductive parts. Anthers and stigma lie close to each other. Pure autogamy occurs since there is no chance of cross-pollination. Cleistogamy is the most efficient floral adaptation for promoting self-pollination. E.g., Vola mirabilis and Oxalis autosella.
