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

Q: Humans have 23 pairs pairs of chromosomes.

A: How many pairs of chromosomes do human have ?
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Q: You see a faster reaction rate when the concentration of reactants is higher.

A: What kind of reaction do you see when the concentration of reactants is higher?
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Q: Biodiversity helps ensure that, at least, some species will survive environmental change.

A:
What helps ensure that, at least, some species will survive environmental change?
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