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18 July, 20:25

Which of the following events happens first in the development of a new organism? A. A sperm fertilizes an egg to form a zygote. B. A morula is formed. C. A blastocyst implants into the uterine wall. D. A zygote undergoes mitosis.

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  1. 18 July, 20:39
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    The development of a new organism begins with answer A, the sperm must fertlize an egg to form the zygote.
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