instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Bacteria may divide several times an hour.
answer:
Bacteria may divide several what an hour?


question:
Matter that mechanical wave energy can only travel through is medium.
answer:
What is the name of matter that mechanical wave energy can only travel through?


question:
Besides the concentration of dissolve oxygen and nutrients in the water, the availability of sunlight limits aquatic organisms.
answer:

Besides the concentration of dissolve oxygen and nutrients in the water, what other factor limits aquatic organisms?