CBSE Class 10 Answered

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As a result of fertilisation, the following changes are observed in a flower:

1. Within two to three days after fertilization, the pistil begins to elongate and swell to accommodate the enlarging ovules.
2. The sepals and petals wither and drop off, having completed their functions(In some, the sepals persist in the fruit, e.g., Solanum.
3. A diploid zygote is formed and develops into an embryo which is the future plant.
4.  The triploid endosperm tissue serves as a source of nutrition for the developing embryo.
5. The ovule becomes seed.
6.  The ovary becomes fruit.
7. The antipodals and synnergids disintegrate before, during or immediately after fertilisation in most of the plants.
8. The outer and inner integuments of ovule become the testa (seed coat) of the seed.