Biology

What do we call things that directly affect all activities of cells?

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What group of animals is warm-blooded and has fur or hair?
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How many chromosomes does a typical human body cell have?
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What forms the outer boundary of a cell and controls material moving in and out of the cell?
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What is the natural sonar that some animals use called?
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What sea creature was likely the cause of the mermaid legend?
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What are the small holes in the skin called?
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Why are many flowers brightly colored?
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What is on your tongue that allows you to taste the differences in different foods?
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