Reproduction in OrganismMedium
Question
Unisexuality of flowers prevents
Options
A.autogamy, but not geitonogamy
B.both geitonogamy and xenogmy
C.geitonogamy, but not xenogamy
D.autogamy and geitonogamy
Solution
The transfer of pollen grains from anther to stigma is called pollination. Autogamy also called self-pollination involves the transfer of pollen grains of one flower to the stigma of same flower. Self-pollination occurs only in bisexual or hermaphrodite flowers.
Geitonogamy involves the transfer of pollen grains from a male to stigma of female flower of same plant. Thus geitonogamy operetes only in monoecious plants, ie, plants having male and female flowers on different places.
Allogamy or xenogamy also known as cross-pollination involves the transfer of pollen grains of male flower to the stigma of same of genetically different female flower. It takes place via various agencies like wind, water, insects etc.
Geitonogamy involves the transfer of pollen grains from a male to stigma of female flower of same plant. Thus geitonogamy operetes only in monoecious plants, ie, plants having male and female flowers on different places.
Allogamy or xenogamy also known as cross-pollination involves the transfer of pollen grains of male flower to the stigma of same of genetically different female flower. It takes place via various agencies like wind, water, insects etc.
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