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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
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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.

User Joe Bobson
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1 Answer

6 votes

It's C. A blastocyst implants into the uterine wall.

User Thorgeir
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