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

[EX Q]: Toxins is contained in the skin of brightly colored poison dart frogs.
[EX A]: What is contained in the skin of brightly colored poison dart frogs?

[EX Q]: The sun delivers power to the chemical factory chloroplasts.
[EX A]: What delivers power to the chemical factory chloroplasts?

[EX Q]: All enzymes have an optimal temperature and ph.
[EX A]:
All enzymes have an optimal temperature and what?