What happens the petal after fertilization?

Answer 1

When a pollen grain lands on the stigma of a flower, whether deposited there by an insect or the wind or by any other means, fertilization of the flower may follow. The pollen develops a tube which grows down through the stigma and style, enters the ovary and in to the ovule. The male sex cell which is carried in the tip of the tube fuses with the female sex cell in the ovule and fertilization is complete.
There is a slight complication: there are two male nuclei in the pollen tube and the second one fuses with another nucleus in the ovule, called the primary endosperm nucleus, and this develops into a food store, called the endosperm, which nourishes the developing embryo plant. An example of endosperm tissue in a seed is the large, starchy part of a grain of wheat, the embryo plant develops from the wheatgerm.

Answer 2

After fertilization, the petal will often begin to wither and fall off. This is because the main function of the petal is to attract pollinators and protect the reproductive organs of the flower. Once fertilization has occurred, the flower no longer needs to attract pollinators, so the petals are no longer necessary and will naturally senesce.

Answer 3

The flower dies and leaves behind fruit and seeds!
They decline further sustenance (water and nutrients), wither, fall off, and become fertilizer for the plant.

Answer 4

it falls off.