Gastrula is the embryonic stage in which _____________.

Cleavage occurs

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Germinal layers form

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Villi form

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Solution

The correct option is D Germinal layers form
Transformation of the blastocyst into gastrula with primary germ layers by rearrangement of the cells is called gastrulation. In all the triploblastic animals three germ layers - ectoderm, mesoderm and endoderm are formed by characteristic movements of some of the cells known as morphogenetic movements.

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Similar questions

Which is correct about human embryonic development a)cleavage divisions brings about considerable increase in mass of protoplasm

b)in the second division, one of the two blastomeres usually divides a little sooner than the second

c)with more cleavage division, the resultant blastomeres becomes larger and larger

d)cleavage division result in hollow ball of cells called morula

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