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Question

Which distinguishes a morula from a blastula

A
Presence of more yolk
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B
Absence of yolk
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C
Presence of a cavity
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D
Absence of a cavity
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Solution

The correct option is D Absence of a cavity
In microlecithal eggs or alecithal eggs, the cleavage results in the production of closely packed blastomeres. The stage in which solid mass of blastomeres appears is said to be morula, whereas blastula is hollow with a cavity known as blastocoel.

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