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Some plants have a mechanism of shedding...

Some plants have a mechanism of shedding of pollen before maturation of stigma. Why?

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The strategy of sheding of pollen before maturation of stigma is to prevent self fertilisation and reduce inbreeding depression. Such mechanisms facilitate cross pollination and produce geneticaly better yielding crops.
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ARIHANT PUBLICATION-SEXUAL REPRODUCTION IN FLOWERING PLANTS-QUESTIONS FOR PRACTICE (Part I Flower, Pre -Fertilisation: Events and Pollination Short Answer Type Questions)
  1. Name all the haploid cells present in an unfertilised mature embryo s...

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  2. Explain the role of tapetum in the formation of pollen grain wall.

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  3. How does the pollen grow through the style? Explain briefly.

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  4. Make a list of any three outbreeding devices that flowering plants hav...

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  5. Explain the significant of pollination in flowering plants .

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  6. What is hydrophily? Name any hydrophilous plant and give its importan...

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  7. Geitonogamous flowering plants are genetically autogamous but function...

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  8. Explain the function of each of the following (i) Coleorhiza (ii) Ge...

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

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  10. What is pollen kit? Write a short note on pollen viability.

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  11. Write the mode of pollination is Vallisneria and water lily. Explain t...

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  12. Trace the development of microsporocyte in the anther to a mature poll...

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  13. What are chasmogamous flowers? Can cross-pollination occur in cleisto...

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  14. Why do some plants have both chasmogamous and cleistogamous flowers?

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  15. Why is geitonogamy also referred to as genetical autogamy?

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  16. Some plants have a mechanism of shedding of pollen before maturation o...

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  17. What is self-incompatibility ? Why does self-pollination not lead to s...

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  18. Mention two strategies evolved to prevent self-pollination in flowers...

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  19. Not all hydrophytes are pollinated by water. Justify by giving two exa...

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  20. Does self incompatibility imposes and restrictions on autogamy? Give r...

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