Question

State the changes taking place in the following structures of flower post fertilization: Zygote Ovule Ovary Sepals

Hint:

Post-fertilization: Zygote→Embryo, Ovule→Seed, Ovary→Fruit.

Answer 1

Changes in Flower Structures After Fertilization:

After fertilization, several structural changes take place in the flower to support seed and fruit formation.

1. Zygote:
– The zygote is formed by the fusion of male and female gametes.
– It undergoes repeated cell division.
– It develops into an embryo, which later becomes the new plant.

2. Ovule:
– The ovule develops into a seed.
– The integuments of the ovule form the seed coat.
– The embryo develops inside the seed.

3. Ovary:
– The ovary enlarges and develops into a fruit.
– The ovary wall forms the pericarp (fruit wall).
– The fruit protects the seeds.

4. Sepals:
– In most flowers, sepals wither and fall off after fertilization.
– In some plants, sepals may remain attached and protect the developing fruit.

Conclusion:
After fertilization, the zygote forms the embryo, the ovule becomes a seed, the ovary develops into a fruit, and sepals usually dry up and fall off.