TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Ectothermic vertebrates control body temperature to just a limited extent from the outside by changing behavior.

SOLUTION: What type of vertebrates control body temperature to just a limited extent from the outside by changing behavior?

PROBLEM: Bile acids, needed to emulsify lipids, are stored in the body in the gallbladder.

SOLUTION: Where are bile acids, needed to emulsify lipids, stored in the body?

PROBLEM: The fossil record indicates that anthropoids began diverging from other primates about 50 many million years ago.

SOLUTION:
The fossil record indicates that anthropoids began diverging from other primates about how many million years ago?