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Where is sporopollenin present in plants...

Where is sporopollenin present in plants? State its significance with reference to its chemical nature.

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The outer thick layer of pollen grain is called exine which is made up of sporopollenin.
Biologically it is the most resistant substance, so pollen grains are well preserved as fossils.
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OSWAAL PUBLICATION-SEXUAL REPRODUCTION IN FLOWERING PLANTS -TOPIC-1 SHORT ANSWER TYPE QUESTIONS-I
  1. Mention two strategies evolved to prevent self-pollination in flowers.

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  2. In the diagram given below, show the path of a pollen tube from the po...

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  3. Identify the type of carpel with the help of diagrams given below :

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  4. Draw the diagram of a mature embryo sac and show its 8-nucleate, 7-cel...

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  5. Give below are the events that are observed in an artificial hybridiza...

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  6. Differentiate Geitonogamy from Xenogamy.

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  7. What is artificial hybridization? Explain emasculation and bagging tec...

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  8. Write a note on the significance of pollination in plants.

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  9. Name the pollinating agents of flowers like maize and wheat. Give any ...

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  10. Differentiate between monoecious and dioecious plants. Give one exampl...

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  11. How many haploid nuclei and haploid cells are present in the female ga...

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  12. What is the role of integuments of ovule after fertilization? Which is...

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  13. Even though each pollen grain has two male gametes, why are at least 1...

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  14. If the chromosome number of a plant species is 20, what would be the c...

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  15. Emasculation may not be necessary, yet bagging is necessary. Justify g...

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  16. State one advantage and one disadvantage of cleistogamy.

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  17. Where is sporopollenin present in plants? State its significance with ...

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  18. Differentiate between intine and exine.

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  19. Differentiate between a matured unfertilized embryo sac and a fertiliz...

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  20. Write the characters of a wind pollinated flower?

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