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Termination of gastrulation is indicated by

1. obliteration of blastocoel
2. obliteration of archenteron
3. closure of blastopore
4. closure of neural tube

Correct answer: closure of blastopore

Solution

Gastrulation is the phase when cells move to form the three germ layers and the primitive gut. Its completion is marked by closure of the blastopore, the opening associated with this process.

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