Answer: A) Proteins and nucleic acids
Explanation:
Answer:
The flu is caused by influenza viruses that infect the nose, throat, and lungs. These viruses spread when people with flu cough, sneeze or talk, sending droplets with the virus into the air and potentially into the mouths or noses of people who are nearby.
Explanation:
Nutrients enter a cell with the concentration gradient by the process of diffusion.
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