Question

List the changes that take place in angiosperms after fertilization has taken place

Answer 1

Solution :

After fertilization, the following changes are observed in a flower:

• There is formation of a diploid zygote and it develops into an embryo, which forms the future plant.

• The endosperm cells serve as a source of nutrition for the developing embryo.

• The ovule becomes the seed.

• The ovary becomes the fruit.

• In most of the plants the antipodals and synnergids disintegrate before, during or immediately after fertilization.

• The outer and inner integuments of the ovule become the testa or the seed coat of the seed.

• Petals and sepals fall off.

Answer 2

Explanation:

• Following are the changes that occur in an angiosperm after pollination and fertilisation

1. The sepals, petals and stamens fall off.
2. The zygote is converted into an embryo.
3. Ovary wall develops into pericarp.
4. Ovary forms the fruit.
5. The embryo is present in the ovule. Ovule forms the seed.

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