Biology

What gives red blood cells their color?

More Questions from Biology
What is a cell that provides energy for another organism called?
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How long can an anteater's tongue get?
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Animals which eat both plants and other animals are known as what?
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What natural biological defense system protects the body from disease and fights off germs?
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Which sea animal is parasitic and attaches itself to fish to suck their blood?
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What type of system circulates blood around the body?
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What part of the plant does most of the photosynthesis?
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What are the tiny blood vessels that connect arteries and veins?
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