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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
Autogamy involves pollination within the same flower, while geitonogamy involves transfer of pollen grains from the anther of one flower to the stigma of another flower of the same plant. Both the processes are prevented in papaya because it is a dioecious plant (i.e. male and female sex organs are born on separate plants) and it always needs cross-pollination.
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Explore conceptually related problems

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.

NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)-SEXUAL REPRODUCTION IN FLOWERING PLANTS-MCQ
  1. Which one of the following statement is correct?

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  2. Advantage of cleistogamy is

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  3. Both, autogamy and geitonogamy are prevented in

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  4. Most resistance biological material is Or An organic substance tha...

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  5. Even in absence of pollinating agents seed-setting is assured in

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  6. Filiform apparatus is a characteristic feature of

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  7. Wind pollination is common in

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  8. Nucellar polyembryony is reported in species of

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  9. In which one of the following pollination is autogamous or Pollination...

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  10. Apomictic embryos in citrus arise from

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  11. The scutellum observed in a grain of wheat or maize is comparable to w...

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  12. Wind pollinated flowers are

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  13. Which one of the following is resistant to any action

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  14. Unisexuality of flowers prevents

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  15. Which one of the following pairs of plant structures has haploid numbe...

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  16. Endosperm is consumed by developing embryo in the seed of

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  17. Male gametes in angiosperms are formed by the division of

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  18. Which one of the following is surrounded by a callose wall

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  19. The arrangement of the nuclei in a normal embryo sac in the dicot plan...

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  20. What would be the number of chromosomes in the cells of the aleuron l...

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