Explain bisexuality in flowers which is a type of autogamy
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a pollen garin contains two male gametes when a pollen grainfalls om the stigma of the carpel it grows a pollen tube downwards into the style. one of the male gametes reaches the ovary through pollen tube and fuses with egg to form zygote .
the other male hanste fuses with two polar nuclie one from end of embryo sac to form endosperm nucleus. this fusion is called triple fusion. the zygote grows into an embryo and an endosperm nucleus grows into endosperm.
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