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10 February, 07:06

Which of the following events happens first in the development of a new organism?

A. A zygote undergoes mitosis.

B. A sperm fertilizes an egg to form a zygote.

C. A blastocyst implants into the uterine wall.

D. A morula is formed.

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  1. 10 February, 07:24
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    It's C. A blastocyst implants into the uterine wall.
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