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Double Fertilisation

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

Read the following statements, state true (T) or false (F) for them and select the correct option. (a) Cleistogamous flowers prevent geitonogamy as well as xenogamy. (b) Double fertilisation occurs in all spermatophytes. (c) In pea family, the single cotyledon is called scutellum. (d) Seeds of castor and coconut retain a part of endosperm during embryo development.

How does fertilisation take place? Fertilisation occurs once in a month. Comment.

Define fertilisation. Give significance of fertilisation

Pollination || Fertilisation

Assertion : Fertilisation which takes place inside the female body is called internal fertilisation. Reason: Internal fertilisation is very common in aquatic animals such as starfish.

The advantages that internal fertilisation has over external fertilisation is that in internal fertilisation :

Reproduction In Organisms || Sexual Reproduction || Events In Sexual Reproduction || Pre-Fertilisation Events || Fertilisation Events || Post-Fertilisation Events