Complete the phylogenetic tree by matching each characteristic that arose during the evolution of animals to its correct position.
segmentation
backbone
endoskeleton
coelom
tissues

Amino acids contain the elements carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. of the 20 amino acids found in humans, 11 are called "nonessential" because they can be manufactured by the body when needed. which elements in these 11 amino acids are commonly obtained from the metabolism of sugar molecules?