Answer:
DNA and RNA
Explanation:
DNA- Deoxyribonucleic acid
RNA- Ribonucleic acid
I’m not positive but: having 2 nutrients on one side of the membrane, and 6 on the other side. 2 of the 6 cross over to make 4 and 4. It’s not using energy since it’s going with the concentration, so it’s passive transport.
Answer: "water vapor" .
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You crave drugs when you don't get the same experience without them so a lack of a desirable sensation causes drug cravings