Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Q: The opening in the front of the eye is called pupil.

A: What is the opening in the front of the eye called?
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Q: All of the populations that live in the same area make up a(n) community, which includes populations of different organisms.

A: All of the populations that live in the same area make up what type of group, which includes populations of different organisms?
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Q: The term gastrointestinal tract describes the long tube that connects the mouth to the anus.

A:
What term describes the long tube that connects the mouth to the anus?
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