Biology
What do we call things that directly affect all activities of cells?
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What is the process of joining the male and female sex cells of a plant called?
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What group of animals do snails, slugs and octopuses belong to?
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What do we call an area that an animal defends from other animals?
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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 protein is found in the hair and nails of mammals?
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