Which amino acids are formed through the shikimate pathway? why do animals not need the shikimate pathway to make these amino acids?

Shikimate pathway. The shikimate pathway (shikimic acid pathway) is a seven step metabolic route used by bacteria, fungi, algae, some protozoan parasites and plants for the biosynthesis of folates and aromatic amino acids (phenylalanine, tyrosine, and tryptophan