Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: Age causes reduction of elasticity in all organs.

Answer: What causes reduction of elasticity in all organs?


Question: Meiosis is part of the process of gametogenesis, which is the production of sperm and eggs.

Answer: Meiosis is part of the process of gametogenesis, which is the production of what?


Question: Stomach organ participates in all digestive activities except ingestion and defecation.

Answer:
What organ participates in all digestive activities except ingestion and defecation?