Areef is made from the hard of marine organisms.

What is the compliment dna strand to the following sequence: ttgactaggcta

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?

How are fossils used to date organisms?