Biology

What is another name for the portion of Earth that sustains life?

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What structures hold plants in the ground?
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Which of these brain structures is part of the limbic system?
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Rice and wheat are both members of what family of plants?
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What is the fold of tissue that surrounds a mollusk's soft body?
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Which of these does a wolf communicate through?
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Now extinct, what shark is thought to have been the largest ever on Earth?
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What is a main reason that many species are becoming endangered?
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Which of these animals below is extinct?
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