Given a scientific passage and an answer, generate a question for the given answer.

Input: Consider Input: Passage: Mutations have many possible causes. Some mutations occur when a mistake is made during DNA replication or transcription. Other mutations occur because of environmental factors. Anything in the environment that causes a mutation is known as a mutagen . Examples of mutagens are shown in Figure below . They include ultraviolet rays in sunlight, chemicals in cigarette smoke, and certain viruses and bacteria. Answer: mutation

Output: What is it called when a mistake occurs in dna replication.

Input: Consider Input: Passage: The combined gas law relates pressure, volume, and temperature of a gas. Answer: combines gas law

Output: Which law relates the pressure, volume, and temperature of a gas?

Input: Consider Input: Passage: The amount of material left over after a certain number of half-lives can be easily calculated. Answer: pheromone
Output: What term is used to describe a chemical released by an animal that affects the behavior or physiology of animals of the same species?