Biology

What does the sea urchin use to help protect itself?

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What is the normal response of a rabbit when spotting a fox?
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What is the process of learning through mistakes called?
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Some insects in the north produce what chemical to serve as a natural antifreeze in the winter?
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What type of plant is a carrot?
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What are plants that grow, reproduce and die all in one season called?
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Which of these animals is a reptile?
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What is another name for the immune system?
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What sea mammal has gotten trapped frequently in tuna fishing nets?
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