How manny amino acids are found in living organisms

There are 20 standard amino acids found in living organisms.

Explanation: Amino acids are the building blocks of proteins. There are 20 standard amino acids found in living organisms, they are: glycine, alanine, proline, valine, leucine, isoleucine, methionine, serine, threonine, cysteine, asparagine, glutamine, phenylalanine, tyrosine, tryptophan, lysine, arginine, histidine, aspartate and glutamate. All the standard amino acids found in living organisms are alpha amino acids because they have a carboxyl group and an amino group bonded to the alpha carbon atom. The alpha carbon atom of all the standard amino acids is bonded to a carboxyl group, an amino group, an R group and a hydrogen atom except in glycine in which the R is another hydrogen atom.

the correct answer is - ability to find a mate

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.