The R group is what allows amino acids to form macromolecules with different properties. every amino acid has the same basic structure, the only difference is what the R group is made up of. The similarities allow the amino acids to form a chain while the differences allows them to have different functions. Hope this helped!
Your answer is C the objects should attract to each other due to Newton's laws.
Arteries and Veins transport blood away from the heart.
Answer: I believe that the answer is D.
Explanation:
