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Prollen grains are well preserved as fos...

Prollen grains are well preserved as fossils because of the presence of:

A

Cellulose

B

Pectin

C

Chitin

D

Sporopollenin

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The correct Answer is:
D
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Identify the pair of wrong statements I. Intine of pollen grains is made up of sporopollenin, II.l Pollen grains are well preserved as fossils because of the presence of sporopollenin, III. Enzymes can degrade the organic material of the pollen grain exine, IV. Sporopollenin can withstand high temperature, strong acids and alkali

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Assertion Pollen grains are well preserved during fossilisation. Reason The exine of pollen grain contains sporopollenin.

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GRB PUBLICATION-SEXUAL REPRODUCTION IN FLOWERING PLANTS-NCERT Corner
  1. The microsporangia develop further and become:

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  2. The pollen grains represents the:

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

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

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

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

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

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

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

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

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

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

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

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

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

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  16. The mature embryo in angiosperms is:

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  17. In grass family, the cotyledon is called:

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  18. The residual, persistent nucellus is called:

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  19. The wall of the ovary develops into:

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  20. A few fowering plants such as some species of Asteraceae and grasses h...

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