Question

How Double Fertilisation occurs in plants?​

Answer 1

DOUBLE FERTILISATION:

》The plants produces pollen grains through the process of microsporogenesis.

》In mature pollen grain, the nucleus of the pollen grain divides into vegetative nucleus and generative nucleus.

》When a pollen grain lands on the stigma of the female flower, pollen tube is formed which reaches the ovule.

》Vegetative and generative nucleus of the pollen grain travels through this pollen tube to fertilise the egg.

》Vegetative nucleus fuses with the central nuclei of the ovule which is called triple fusion. The generative nucleus fuses with the egg resulting in zygote formation.

》Thus two fertilisation takes place at the same time. Hence, this process is called double fertilisation.

That's how Double Fertilisation occurs in plants.

Answer 2

Answer:

DOUBLE FERTILIZATION

Double fertilization is a major characteristic of flowering plants. In this process, two male gametes fuse with one female gamete wherein one male gamete fertilizes the egg to form a zygote, whereas the other fuses with two polar nuclei to form an endosperm.Double fertilization gives stimulus to the plant that results in the development of the ovary into fruit and ovules into the seed. The fusion of haploid male and female gametes restores the diploid condition of the plant.