Why is it possible for an amino acid to be specified by more than one kind of codon?

In the name staphylococcus aureus, aureus is thea. kingdom.b. specific name.c. genus.d. domain name.e. family name.

If jane has the blood type ab and marries john who has type o blood what are the possible phenotypes of their first kid?

12) several teeth were found in an area of flat land covered with trees and plants. the teeth were examined by a paleontologist, and it was determined that the teeth came from a shark. they found many other shark teeth in this area. however, the people who discovered the teeth were puzzled, because there was no source of water near where the fossils were found. what is the paleontologist's best explanation for why the teeth were found in this area? a) sharks used to live on flat land. b) this area was once covered with salt water. c) this area was once covered with freshwater. d) someone buried the shark teeth deep in the ground.