Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

Q: Question: What type of ecosystem do polar bears live in? Answer: arctic

A: Polar Bears. Thick fur and a layer of blubber keep polar bears warm in their Arctic ecosystem. Why do you think their fur is white? Why might it be an adaptation in an Arctic biome?.
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Q: Question: Enzymes - proteins which speed up what? Answer: chemical reactions

A: enzymes - proteins which speed up chemical reactions.
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Q: Question: What is split to produce nuclear energy? Answer: atoms

A:
Nuclear energy is produced by splitting atoms. It also produces radioactive wastes that are very dangerous for many years.
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