A gateway substance is something that may be menial but could lead to something bigger, an example is weed in the drugs world, weed is not hard to get and is usually a gateway drug to stronger types of drugs and potentially more dangerous
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To study objects that are way too small
C. nucleic acids (consisting of genes which encode for specific proteins to be synthetized)
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I know it will decrease. The venticles are filling with less blood between beats most likely since the heart is beating faster. (I hope this helps!)
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