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

Q: The brain is the most complex organ in the human body.

A: What is the most complex organ in the human body?
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Q: Sexual reproduction, in general, relies on sets of cells that are precursors for eggs and sperm.

A: What kind of reproduction, in general, relies on sets of cells that are precursors for eggs and sperm?
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Q: Seedless and seed are the two divisions of vascular plants.

A:
What are the two divisions of vascular plants?
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