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

Q: Sexually do invertebrates reproduce.

A: How do invertebrates reproduce?
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Q: The male reproductive system consists of structures that produce sperm and secrete testosterone.

A: What does the male reproductive system consist of?
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Q: The depth of the atmosphere is greatest sea level.

A:
The depth of the atmosphere is greatest where?
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