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1. Give details of two different ways in which a zygote develops in case of animals where fertilization is internal?
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1. Give details of two different ways in which a zygote develops in case of animals where fertilization is internal. Ans: (i) Internal fertilization in earthworm: An earthworm , though a hermaphrodite, does not fertilize itself. Two earthworms come in contact with each other and exchange sperms.
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