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

Example Input: Passage: The three types of muscles in the body include skeletal muscle, smooth muscle, and cardiac muscle. Answer: muscle
Example Output: Smooth, cardiac, and skeletal are all types of what?

Example Input: Passage: Minerals form from dissolved substances when water evaporates. Answer: evaporation
Example Output: What process does water undergo to leave behind dissolved substances?

Example Input: Passage: A virus cannot reproduce on its own. However, a virus can reproduce by infecting the cell of a living host. Inside the host cell, the virus uses the cell's structures, materials, and energy to make copies of itself. Answer: virus
Example Output:
What can reproduce by infecting the cell of a living host?