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Stigma acts as...

Stigma acts as

A

Receptive organ for pollens

B

An organ to promote the germination of only desired pollens

C

An organ to discourage germination of undesired pollens

D

All of the above

Text Solution

Verified by Experts

The correct Answer is:
D
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GRB PUBLICATION-SEXUAL REPRODUCTION IN FLOWERING PLANTS-NCERT Corner
  1. Stigma acts as

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  2. To a biologist, flowers are:

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  3. A typical angiosperm anther is:

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  4. The anther is a four-sided structure consisting of:

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  5. The microsporangia develop further and become:

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  6. The pollen grains represents the:

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  7. The hard outer layer of pollen grains called exine is made up of:

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  8. Prollen grains are well preserved as fossils because of the presence o...

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  9. Which of the following has been claimed to increase the performance of...

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  10. Pollen grains lose viabiliyt within 30 minutes of their release in:

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  11. Arising from the placenta are the megasporangia, commonly called:

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  12. Opposite the micropylar end, representing the basal part of the ovule ...

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  13. In embryo sac, three cells are grouped together at the micropylar end ...

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  14. The only type of pollination which during pollination brings genetical...

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  15. Hair present on the cob of corn are Or Long filamentous threads pr...

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  16. The condition which prevents both autogamy and geitongamy is:

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  17. Floral rewards providing safe places to lay eggs occur in:

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  18. The central cell of embryo sac after triple fusion becomes:

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  19. The tissue in which cells are filled with reserve food materials and a...

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  20. The mature embryo in angiosperms is:

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  21. In grass family, the cotyledon is called:

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