instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Control rods play an important role in the modulation of the nuclear chain reaction.
answer:
What play an important role in the modulation of the nuclear chain reaction?


question:
Macroevolution happens when forces of evolution work over a long period of time.
answer:
What happens when forces of evolution work over a long period of time?


question:
Other than gametes, normal human cells have a total of 46 chromosomes per cell.
answer:

Other than gametes, normal human cells have a total of how many chromosomes per cell?