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What do you understand by double fertili...

What do you understand by double fertilization?

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It is fusion of two male gametes brought by a pollen tube with two different structures (i.e., egg and diploid secondary nucleus) in the same embryo sac to produce two different structures (zygote and primary endosperm cell). Double fertilization was discovered by Nawaschin, 1898 in Fritillaria and Lilium.
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BETTER CHOICE PUBLICATION-SEXUAL REPRODUCTION IN FLOWERING PLANTS -LONG ANSWER TYPE QUESTIONS
  1. How do roots take part in vegatative propagation?

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  2. Write six differences between Self Pollination and Cross Pollination.

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  3. What do you understand by double fertilization?

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  4. Describe the process of development of female gametophyte and illustra...

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  5. Describe the development of male gametophyte or pollen in Angiosperms ...

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  6. What is seed germination? Describe the various external and internal f...

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  7. Describe various factors which favour cross pollination.

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  8. Describe the various steps involved in seed germination.

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  9. Discuss the development of dicot embryo with suitable diagram.

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  10. Higher organisms have resorted to sexual reproduction in spite of its ...

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  11. Explain why meiosis and gametogenesis are always interlinked?

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  12. Draw a well labelled diagram of T.S. of mature anther of an angiosperm...

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  13. What is triple fusion ? Where and how does it take place ? Name nuclei...

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  14. Write four differences between dicot and monocot seeds.

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  15. Give six differences between wind pollinated flowers and insect pollin...

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  16. Why is apple called a false fruit? Which part of flower form its fruit...

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  17. Write four characteristics of wind pollinated flowers.

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  18. Write down two advantages and two disadvantages of self-pollination.

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  19. Write a note on development of Endosperm.

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  20. Explain three types of Endosperm with examples.

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