instruction:
Given a scientific passage and an answer, generate a question for the given answer.
question:
Passage: Conditioning is a way of learning that involves a reward or punishment. If you ever trained a dog to obey a command, you probably gave the dog a tasty treat each time he performed the desired behavior. It may not have been very long before the dog would reliably follow the command in order to get the treat. This is an example of conditioning that involves a reward. Answer: conditioning
answer:
The way of learning that involves reward and punishment is called?

question:
Passage: To ensure that no more than one sperm fertilizes the egg, once the acrosomal reactions take place at one location of the egg membrane, the egg releases proteins in other locations to prevent other sperm from fusing with the egg. If this mechanism fails, multiple sperm can fuse with the egg, resulting in polyspermy. The resulting embryo is not genetically viable and dies within a few days. Answer: polyspermy
answer:
What is the term for if multiple sperm fuse with an egg?

question:
Passage: Electrophiles have a strong tendency to react with nucleophiles. CONCEPTUAL PROBLEMS. Answer: nucleophiles
answer:
Electrophiles have a strong tendency to react with what?