Question

After fertilization the integument ovule changing in to

Answer 1

ovule will change into seed after fertilization.

Answer 2

$\huge\mathfrak{A{\underline{\underline{\textbf{\red{nswer :}}}}}}$

→ A flower consists of two parts. One is male part and another is female part.

* Male parts consists of long, stalk part called Filament and upper broad portion called Anther. Anther contains pollen grains.

* Female parts consists of upper broad portion called Stigma. Middle thin part called Style and the lower portion called Ovary. Ovary conatins ovule.

→ When a pollen grain reach the stigma of the flower then it secretes some liquid substance which is absorbed by pollen grain. After it they form a pollen tube which ultimately reach the ovule of the ovary.

→ Now, the two male gamates (pollen grains) start travelling through this pollen tube and reach the ovule of the ovary, which contains egg and two polar nuclei.

→ When a male gamate fuse with egg then it forms zygote by the process of fertilization and this type of fertilization in plants is known as Syngamy. And when a another male gamate fuse with two polar nuclei, it is known as triple fussion; then it form primary endosperm nucleus. 

* Since, the fusion occurs two times. So, this type of fusion is known as as Double Fusion.

→ After is the zygote develops into the embryo and the primary endosperm nucleus into endosperm which provides nourishment to the growing embryo.

* $\textbf{After it the ovule develops into seed}$ and ovary into fruit.

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