Question

Draw a neatly labled diagram to explain plant fertilisation. Write few points on pollen grain.

Answer 1

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→ [Diagram is in Attachment !!]

# POLLEN GRAINS :-

→ The anther produces pollen grains.

→ When pollen grains reach the stigma of a plant they release some liquid substance. Which was absorbed by stigma. Then stigma make pollen tube, which ultimately reach the ovule of the ovary.

→ The pollen grains travel through the pollen tube towards ovule.

→ When a pollen grain (male gamate) fuse with egg then it forms zygote, by the process of Fertilization.

→ And when another pollen grain (male gamate) fuse with polar nuclei, then it forms primary endosperm nucleus.

* Sine, fusion occurs times so it is known as Double fertilization in plants.

* After it the zygote develops into embryo and the primary endosperm nucleus into endosperm which provides nourishment to the developing embryo.

* After it the ovary develops into fruit and ovule into seeds.

Answer 2

$\textbf{Answer is in Attachment !}$