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Question

Morula is a developmental stage


A
between the zygote and blastocyst
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B
between the blastocyst and gastrula
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C
after the implantation
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D
between implantation and parturition.
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Solution

The correct option is D between the zygote and blastocyst
After fertilisation, zygote is formed. Zygote undergoes, mitotic divisions, called cleavage, to form 2, 4, 8 and 16 daughter cells called blastomeres. These divisions start when zygote is moving towards uterus. It is called morula at 8-16 cell stage and it continues to divide to form blastocyst.

Biology

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