Question

Write the post fertilisation changes that occur in a flower.

Answer 1

Step 1: Understanding post-fertilization changes:
After fertilization in a flower, several changes occur in the flower to ensure the development of seeds and fruit. These changes are crucial for the continuation of the plant species.

Step 2: Changes in the ovule:
- The fertilized ovule develops into a seed. The fertilized egg cell (zygote) inside the ovule undergoes cell division and develops into the embryo.
- The ovule's outer layers transform into the seed coat, which protects the developing embryo.

Step 3: Changes in the ovary:
- The ovary of the flower starts to enlarge and mature, forming the fruit. The ovary wall thickens and develops into the pericarp (fruit wall).
- As the ovary matures, it may change in shape, color, and texture to become a fleshy or dry fruit, depending on the type of plant.

Step 4: Changes in the other flower parts:
- The petals, stamens, and style typically wither and fall off as the flower's role in reproduction is complete.
- The stigma may also shrivel and dry up after fertilization.

Step 5: Conclusion:
Post-fertilization, the ovule becomes a seed, and the ovary transforms into a fruit. These changes are essential for the development of new plants, ensuring the continuation of the species.