instruction:
Given a scientific passage and an answer, generate a question for the given answer.
question:
Passage: Humans learn behaviors through conditioning, as well. A young child might learn to put away his toys by being rewarded with a bedtime story. An older child might learn to study for tests in school by being rewarded with better grades. Can you think of behaviors you have learned by being rewarded for them?. Answer: conditioning
answer:
How do humans learn behaviors?

question:
Passage: Any magnet has two ends called poles where the magnetic effect is strongest. Answer: poles
answer:
What do you call the two ends of a magnet where the magnetic effect is strongest?

question:
Passage: Simple diffusion occurs when a substance diffuses through a cell membrane without any help from other molecules. The substance simply passes through tiny spaces in the membrane. It moves from the side of the membrane where it is more concentrated to the side where it is less concentrated. You can see how this happens in Figure below . Answer: simple diffusion
answer:
What occurs when a substance diffuses through a cell membrane without any help from other molecules?