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Both, autogamy and geitonogamy are preve...

Both, autogamy and geitonogamy are prevented in

A

Papaya

B

Cucumber

C

Castor

D

Maize

Text Solution

Verified by Experts

The correct Answer is:
A
Papaya is dioecious (i.e. male and female flowers and different individuals) so xenogamy is the only way for pollination in which pollens are transferred from anther of one flower to stigma of another flower of different plant.
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Autogamy as well as geitonogamy is prevented in

Geitonogamy is

(a) Describe any two devices in a flowering plant which prevent both autogamy and geitonogamy. (b) Explain the events upto double fertilization after the pollen tube enters one of the synergids in an ovule of an angiosperm .

Geitonogamy is:

Assertion :- In monoecious plants neither autogamy nor geitonogamy can be observed. Reason :- In monoecious plants male and female flowers produce on different plants

Autogamy means

Assertion : Although geitonogamy is functionally crosspollination involving a pollinating agent, genetically it is similar to autogamy. Reason : In geitonogamy, pollen grains from the anthers of one flower are transferred to the sigma of another flower borne on the same plant.