Question

Double fertilization? give its significance

Answer 1

aloha!

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◆double fertilization occurs in plants.
◆where:
•the ovary turns into fruit.
•the ova turns into seed.

actually the pollen grain produces two male germ cells one of which combines with ova and other one with the polar nuclei.

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hope it helps :)

Answer 2

Double fertilization is a characteristic feature of flowering plants. In the process of double fertilization out of the two sperm nucleus, one sperm nucleus fuses with the egg nucleus to form an embryo ( process is called syngamy) and another fuses with polar nuclei to form endosperm ( process is called triple fusion).
Its significance are -:
It gives stimulus to the plant due to which ovary develops into fruit and ovules develop into seeds.
It restores the diploid condition by fusion of haploid male and female gametes.
It results in the formation of diploid zygote, which develops into an embryo and gives rise to a new plant.
It results in the formation of triploid primary endosperm nucleus (PEN) which develops into endosperm in the seed. It provides nourishment to the developing embryo.
It brings about recombination of characters resulting in variation among the offspings.