Biology

Which phylum of animals includes the sea star and the sand dollar?

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What substance, found in food, helps move wastes through the body?
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Historically, which pathogen or disease has killed the most people?
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What process converts sugars into energy and involves breathing oxygen?
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What embryological experiment was performed by Hilde Proescholdt?
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What part of the blood helps clotting?
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What are the thin bones that protect your lungs and heart?
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Which of these animals is closely related to a lobster?
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What type of worm is an earthworm?
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