Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

[EX Q]: Autosomes is another term for body chromosomes.
[EX A]: What is another term for body chromosomes?

[EX Q]: Some viruses carry a few viral enzyme molecules within their capsids.
[EX A]: Some viruses carry a few viral enzyme molecules within their what?

[EX Q]: Five mass distinctions have radically altered the history of life.
[EX A]:
How many mass distinctions have radically altered the history of life?