Answers

2015-05-27T21:41:59+05:30
Zygote undergoes cleavage and changes into multicellular embryo by mitotic division.  
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2015-05-28T10:07:26+05:30
The single cell formed after the combination of sperm and egg is called a zygote.It is the first cell of an individual which undergoes cell division to give rise to a complete individual.Therefore, a single cell becomes a individual by cell division.

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