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: Renewable resources are natural resources that can be replaced in a relatively short period of time or are virtually limitless in supply. Renewable energy resources include sunlight, moving water, wind, biomass, and geothermal energy. Each of these energy resources is described in Table below . Resources such as sunlight and wind are limitless in supply, so they will never run out. Besides their availability, renewable energy resources also have the advantage of producing little if any pollution and not contributing to global warming. The technology needed to gather energy from renewable resources is currently expensive to install, but most of the resources themselves are free for the taking. Answer: renewable resources

Output: What are natural resources which can be replaced in a relatively short period called?

Input: Consider Input: Passage: Segmented worms include the common earthworm and leeches. Answer: segmented
Output: The common earthworm and leeches are examples of what type of worm?