TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Reptiles are described by the term ectothermic, which means their internal temperature depends on the temperature of their environment.

SOLUTION: Reptiles are described by what term that means their internal temperature depends on the temperature of their environment?

PROBLEM: Producing sperm and secreting testosterone are the main functions of male reproductive system system.

SOLUTION: Producing sperm and secreting testosterone are the main functions of what system?

PROBLEM: Evolution that occurs over a short period of time is known as microevolution.

SOLUTION:
Evolution that occurs over a short period of time is known as what?