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

[EX Q]: Phototaxis is the term for movement toward light.
[EX A]: What is the term for movement toward light?

[EX Q]: A change of season and less food usually cause certain animals to migrate.
[EX A]: Which two environmental changes usually cause certain animals to migrate?

[EX Q]: Anaerobic type of organism was the only able to live in the anoxic atmosphere of the first 2 billion years.
[EX A]:
What type of organism was the only able to live in the anoxic atmosphere of the first 2 billion years?