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

Q: Poles parts of the planet does solar energy have difficulty reaching.

A: What parts of the planet does solar energy have difficulty reaching?
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Q: Standard measurements in science are very important so that we can compare experimental data from one lab to another and make sure we all are talking about the same thing.

A: What in science are very important so that we can compare experimental data from one lab to another and make sure we all are talking about the same thing?
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Q: Immune cells type of cells in the body fluids and tissues of most animals specifically interact with and destroy pathogens.

A:
What type of cells in the body fluids and tissues of most animals specifically interact with and destroy pathogens?
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