Describe how the 20 amino acids are similar yet different in their structure

They are different in structure because of their side groups because this is what makes each of the amino acids in our body, which will point out their own difference towards one another. Their similarities and what they have in common is they all have chemical structures in their amino acid molecules.

straight or amphibians are homeothermic to thermal

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.