Given a scientific question, generate a correct answer to it.

[EX Q]: Water is formed from oxygen and what other element?
[EX A]: hydrogen

[EX Q]: To figure out the height of a wave you measure the distance between the crest and what?
[EX A]: trough

[EX Q]: What do you call cellular respiration that does not need oxygen to proceed?
[EX A]:
anaerobic respiration