The shared genetic code of all life on earth is evidence that

a. the genetic code arose relatively late in the history of life on earth
b. dna replication is error-free
c. all life shares a common ancestry bacterial
d. cells arose earlier than eukaryotic cells

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?