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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

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The correct Answer is:
A
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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.

MODERN PUBLICATION-REPRODUCTION IN ORGANISMS-COMPETITION FILE OBJECTIVE TYPE QUESTIONS (MULTIPLE CHOICE QUESTIONS (MCQs)):
  1. Banana is vegetatively propagated by

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  2. Find out correct order of vegetative propagules of plants like potato,...

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  3. Both, autogamy and geitonogamy are prevented in

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  4. In general, pollen tube enter the ovule through

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  5. Transfer of pollen grains from anther to the stigma of another flower ...

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  6. The endosperm cells in angiosperms are

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  7. The fleshy edible part of an apple is

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  8. Why asexual reproduction is sometimes disadvantageous ?

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  9. Product of sexual reproduction generally generates

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  10. An unorganised mass of cells is called

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  11. A few plants exhibit unusual flowering phenomenon, which of them fl...

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  12. There are various types of reproduction. The type of reproduction adop...

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  13. Which one of the following is not a natural method of vegetative propa...

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  14. Which one of the following plants does not help in vegetative ...

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  15. Which of the following pairs is not correctly matched?

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  16. Flowers are unisexual in

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  17. Which of the following statements is not correct?

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  18. Which of the following flowers only once in its life-time

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  19. Vegetative reproduction in onion occurs by:

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  20. Select the incorrect statement.

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