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: Opaque is the term for matter that does not let any light pass through.

Answer: What is the term for matter that does not let any light pass through?


Question: The pressure of ocean water increases rapidly as the water gets deeper.

Answer: What property of ocean water increases rapidly as the water gets deeper?


Question: Each pollen grain has two coverings: the exine (thicker, outer layer) and the intine.

Answer:
Each pollen grain has two coverings: the exine (thicker, outer layer) and the what?