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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 …

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 …
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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.

User NiZa
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2 Answers

5 votes

Definitely the answer is A

This process called Fertilization

User Maqjav
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4 votes
The development of a new organism begins with answer A, the sperm must fertlize an egg to form the zygote.
User Himanshu Mahajan
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After fertilization, the _______ implants in the uterine wall. a. placenta b. blastocyst c. morula d. ovum
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