Amino acids are the building blocks of proteins. there are 20 amino acids that most commonly occur in proteins. based on the functional group making up their side chain, or r group, amino acids are classified as acidic, basic, or neutral. the physical and chemical properties of the r group determine the unique characteristics of each amino acid.

acceleration= v2-v1/t so 8m/s-3m/s / 3s =to 8/3 or

2.67 m/s^2

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-lavira: )

answer: accepted answer: aquatic animals use the oxygen dissolved in water to carry out respiration. since the amount of dissolved oxygen in water is low as compared to the amount of oxygen in the air, therefore the rate of breathing in aquatic animals is much faster than it is in terrestrial animals.

explanation: