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Both, autogamy and geitonogamy are preve...

Both, autogamy and geitonogamy are prevented in

A

Cucumber

B

Castor

C

Maize

D

Papaya

Text Solution

Verified by Experts

The correct Answer is:
D
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In Castor and Maize plants (a) Autogamy is prevented but not geitonogamy (b) Both autogamy and geitonogamy are prevented (c) Male and female flowers are borne by different plants (d) Anthers and stigma are placed at different positions to encourage cross pollination

(a) Describe any two devices in a flowerings plant which prevent both autogamy and geitonogamy (b) Explain the events up to double fertialisation after the pollen tube enters one of the synergids in an ovule of an angisoperm.

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

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What is geitonogamy?

Define geitonogamy.

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.

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Which of the given plant features promotes autogamy but never geitonogamy or xenogamy?

Geitonogamy does not occur in