Question

explain double fertilization?​

Answer 1

Answer:

Double Fertilization involves two sperm cells;one fertilizes the egg cell to form the zygote, while the other fuses with the two polar nuclei that form the endosperm. After Fertilization ,the fertilised ovule forms the seed while the tissues of the ovary become the fruit.

It occurs when one Male nucleus fertilizes (fuses)with egg cell to form zygote cell and other male male nucleus fuses(fertilizes)with two polar nuclei to cause triple fusion.

Explanation:

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Answer 2

Answer:

Double fertilization involves two fertilization.

• One sperm nucleus fuses with egg cell nucleus.

• Other sperm nucleus fuses with two polar nuclei together.

Explanation:

The pollen tube grows through the stigma and style by dissolving the tissues with the help of enzymes and reaches the ovary. There, it pushes through the micropyle and reaches the embryo sac.

The tube nucleus which had directed growth of pollen tube all the way down, now disintegrates.

Now, the pollen tube enters one of the synergids and releases and two sperm nuclei. Of these, one sperm nucleus fuses with the egg cell nucleus to form the zygote while the other sperm nucleus moves towards the two polar nuclei in the central cell and fuses with them.

Thus, three nuclei fuse together/tripe fusion to produce endosperm nucleus.

All together two fertilization have occurred and hence termed double fertilization.