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

Q: Antifreeze lowers it the freezing temperature of the water in car radiators.

A: What does antifreeze do to the freezing temperature of the water in car radiators?
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Q: A desmosome is a cell structure that anchors the ends of cardiac muscle fibers together.

A: A desmosome is a cell structure that anchors the ends of what fibers together?
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Q: Photoautotrophs and chemoautotrophs are two basic types of autotrophs.

A:
Photoautotrophs and chemoautotrophs are two basic types of what?
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