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Blastopore is

1. opening of neural tube
2. opening of gastrocoel
3. future anterior end of embryo
4. found in blastula

Correct answer: opening of gastrocoel

Solution

The blastopore is the opening formed during gastrulation that leads into the archenteron, also called the gastrocoel in some texts. It is not related to the neural tube or blastula stage.

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