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Sexual Reproduction in Flowering Plants

what is the f...

Question

what is the fate of zygote and primary endosperm nucleus formed in double fertilisation?

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Solution

Zygote will be developed into an embryo and primary endosperm nucleus (PEN) will be developed into an endosperm which provides nourishment to the embryo.

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Q. In double fertilisation, one male gamete fuses with the __(i)__ to form zygote and the other male gamete fuses with __(iii)__ to form primary endosperm nucleus.

Q. What are the fates of the zygote and the endosperm nucleus?

Q. Describe the development of endosperm after double fertilisation in an angiosperm. Why does endosperm development precede that of zygote? [3]

Q. Mention the reasons for the difference in ploidy of zygote and primary endosperm nucleus in an angiosperm?

Q. Assertion :In angiosperms, endosperm development precedes embryo development. Reason: Double fertilisation ensures that the nutritive tissue is formed before the zygote starts cleaving so that the energy spent on the formation of endosperm does not get wasted.

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Sexual Reproduction in Flowering Plants

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