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How the male gamete in the pollen grain reaches the female gamete present in the ovule?
 Fertilisation takes place after pollination. The male nucleus inside the tube fuses with the female nucleus in the ovule to form a zygote. A tube grows out of the pollen grain on the stigma and down through the style to the ovary. The male gamete is contained inside the pollen tube. As it penetrates the wall of the ovary the tube grows towards the ovule. The tube enters the ovule through a tiny hole called the microphyle. The male nucleus inside the tube fuses with the female nucleus in the ovule to form a zygote. This is fertilisation and results in the formation of a zygote.
After fertilisation the fertilised ovule grows into a seed. As the petals and stamens wither and die the ovary wall forms the fruit. Plants produce two different types of fruit, fleshy and dry. Tomatoes, apples and pears are examples of fleshy fruits. Hazel nuts, peas and dandelion seeds are examples of dry fruits.


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