Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: Darwin believed in gradualism.

Answer: Did darwin believe in punctuated equilibrium or gradualism?

Question: Interconnected pathways through which carbon is recycled through the biotic and abiotic components of biosphere.

Answer: Interconnected pathways through which carbon is recycled through the biotic and abiotic components of what?

Question: Mineral crystals are formed when hot lava cools.

Answer:
What is formed when hot lava cools?