Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Bones are made up of different types of tissue.
Bones are made up of different types of what?

Three many families are known quarks divided into.
How many families are known quarks divided into?

Evolution that occurs over a short period of time is known as microevolution.
Evolution that occurs over a short period of time is known as what?