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

Example Input: Passage: Asexual reproduction involves just one parent. It produces offspring that are genetically identical to the parent. Methods of asexual reproduction include binary fission, fragmentation, and budding. Answer: asexual
Example Output: What type of reproduction only involves one parent?

Example Input: Passage: The Gaia hypothesis states that the biosphere is its own living organism. Answer: the gaia hypothesis
Example Output: What hypothesis states that the biosphere is its own living organism

Example Input: Passage: All chemical reactions, even exothermic reactions, need activation energy to get started. Activation energy is needed to bring reactants together so they can react. Answer: activation energy
Example Output:
What do all chemical reactions need to get started?