reproduction in palnts how the endosperm is formed?
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Cells on the surface of the stigma secrete a sticky nutrient fluid containing sugar and other substances.This will help the pollengrain to germinate to form pollen tube.The pollen tube penetrates into opening of ovule and finally enters into the embryo sac and releases the two sperms into the embryo sac.One of the two sperms fuse with the egg to form a zygote.The second sperm fuses with fusion nucleus and forms the endosperm.
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