Question

Trace the changes that take place in a flower from gamete formation to fruit

formation.​

Answer 1

Explanation:

Various changes take place after fertilization. These include endosperm and embryo development, maturation of the ovules to form seeds and maturation of the ovary to give rise to a fruit. The zygote divides to give rise to two cells called as the terminal cell and basal cell.

Answer 2

Answer:

Stamen is the male reproductive part and it produces pollen grains.

·The ovary contains ovules and each ovule has an egg cell.

·The pollen needs to be transferred from the stamen to the stigma.

·If this transfer of pollen occurs in the same flower, it is referred to as

self-pollination./ On the other hand, if the pollen is transferred from

one flower to another, it is known as cross-pollination.

After the pollen lands on a suitable stigma, it has to reach the female

germ-cells which are in the ovary. For this, a tube grows out of the

pollen grain and travels through the style to reach the ovary/Figure

·The male germ-cell produced by pollen grain fuses with the female

gamete present in the ovule.

·This fusion of the germ-cells or fertilisation gives the zygote.

·After fertilisation, the zygote divides several times to form an embryo within the ovule.

·The ovule develops a tough coat and is gradually converted into a

seed. The ovary grows rapidly and ripens to form a fruit.

·Meanwhile, the petals, sepals, stamens, style and stigma may shrivel

and fall off.

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