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Why is the process of fertilisation in angiosperms termed as double fertilisation? Explain. |
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Answer» On reaching synergid, pollen tube releases the two male gametes into cytoplasm of synergid. One of the male gamete fuses with egg nucleus to form a diploid zygote. This is called syngamy. Other male gamete fuses with polar nuclei at the centre to produce a triploid primary endosperm nucleus (PEN). This is termed as triple fusion. As syngamy and triple fusion take place simultaneously in the embryo sac, it is termed as double fertilisation. |
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