instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Spring tides are created when the sun and moon's tides match.
answer:
Which type of tides are created when the sun and moon's tides match?


question:
Three many families are known quarks divided into.
answer:
How many families are known quarks divided into?


question:
Growth factors and certain plant and animal hormones serve as molecular messengers that initiate pathways of cell division.
answer:

Growth factors and certain plant and animal hormones serve as molecular messengers that initiate pathways of what?