TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Collision frequency is greater for homogeneous category of catalysts, which also tend to be more sensitive to temperature and more 'expensive'.

SOLUTION: Collision frequency is greater for what category of catalysts, which also tend to be more sensitive to temperature and more 'expensive'?

PROBLEM: You call a group of organisms of the same species that live in the same area a(n) population.

SOLUTION: What do you call a group of organisms of the same species that live in the same area?

PROBLEM: The high points in a transverse wave are called crests.

SOLUTION:
What are the high points in a transverse wave called?