Which stage of early embryonic development is a solid ball of cells before the formation of a blastocyst?

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Multiple Choice

Which stage of early embryonic development is a solid ball of cells before the formation of a blastocyst?

Explanation:
Early embryonic development involves cleavage, a series of rapid cell divisions without growth. This transforms the fertilized egg into a solid ball of cells called the morula, usually by day 3–4, with no internal cavity. As development continues, fluid forms a cavity to create the blastocyst, a hollow sphere with a cavity and specialized cell groups. So the solid ball stage before the blastocyst is the morula.

Early embryonic development involves cleavage, a series of rapid cell divisions without growth. This transforms the fertilized egg into a solid ball of cells called the morula, usually by day 3–4, with no internal cavity. As development continues, fluid forms a cavity to create the blastocyst, a hollow sphere with a cavity and specialized cell groups. So the solid ball stage before the blastocyst is the morula.

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