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

Q: Seeds of a pine cone are easily carried by the wind and dispersed because seeds have wings.

A: Why are seeds of a pine cone easily carried by the wind and dispersed?
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Q: Skeletal muscles must work in pairs to move bones back and forth at a joint because they can only contract.

A: Skeletal muscles must work in pairs to move bones back and forth at a joint because they can only do what?
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Q: Tamiflu inhibits spread of virus.

A:
What effect does tamiflu have on viruses and cells?
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