In human embryogenesis, how many hours does it take after fertilization to form the following; a. Two cell stage b. Four cell stage c. Eight cell stage d. Morula e. Early blastocyst f. Late blastocyst 2. What are the different parts of a blastocyst?

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A: Answer is a.) All of the Organ systems.

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Q: only symmetric cell division whereas oogenesis involves asymmetric cell division

A:

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Q: After the eighth week of development an embryos is referred to as what?

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