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

[EX Q]: Salt-water biomes in the ocean are called marine biomes.
[EX A]: Salt-water biomes in the ocean are called what?

[EX Q]: The male reproductive system consists of structures that produce sperm and secrete testosterone.
[EX A]: What does the male reproductive system consist of?

[EX Q]: Fresh water biomes are defined by low salt concentration.
[EX A]:
What are fresh water biomes defined by?