instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Virtually all aquatic organisms depend directly or indirectly on protists for food.
answer:
Virtually all aquatic organisms depend directly or indirectly on what for food?


question:
Carried through body happens if cancer cells enter the blood stream.
answer:
What happens if cancer cells enter the blood stream?


question:
The creation and destruction of oceanic crust is the reason continents move.
answer:
The creation and destruction of oceanic crust is the reason what moves?