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Question

How does process of fertilisation take place in flowers?


Solution

When ripe pollen from an anther of the same kind of flower catches on the stigma, each pollen grain sends out a tiny threadlike tube called pollen tube. The tube grows down through the style, reaches the ovary of a pistil and pierces one of the ovules in the ovary. A male gamete fuses with a female gamete in the ovule.This process is called fertilization.
Each ovule must receive the contents of the pollen tube before it can develop into a seed. It usually takes the tube from two to five days to reach the ovule, but the time may vary from a few hours to six months.

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