Biology

What are the thin bones that protect your lungs and heart?

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What is the sticky part of the pistil called?
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What is the tube that carries food into the stomach called?
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How does an insect smell?
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What are the small bones that make up a backbone called?
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What are all the living and non-living things in one area called?
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What are the young leaves of a plant embryo called?
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The brain is divided into how many lobes?
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What color is a polar bear's skin?
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