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A small mark spot or pore such as the respiratory spiracle of an insect or an eye spot in certain algae is known as stigma The top of the centre part of the flower that receives the pollen which allow it to form new seed.
Stigma is the female reproductive organ. It is on the top of the flower . Stigma receives pollen grains ( a male reproductive organ) to that it can fertilize the egg in the ovary ( also a female reproductive organ )
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