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Question

Mass separation of cells in embryo is

A
Emboly
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B
Involution
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C
Delamination
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D
Epiboly
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Solution

The correct option is C Delamination
Emboly is the process in which there occurs an invagination of the blastula to form gastrula.
Involution- A tissue sheet rolls inward to form an underlying layer via bulk movement tissue.
Delamination- Splitting or migration of one sheet into two parallel sheets.
Epiboly- During this movement the cells on one side grow rapidly and surround the slow growing cells on other side and eventually from ectoderm.
So, the correct answer is 'Delamination'.

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