D oxygen there was no free oxygen on the earth
Answer:
Both Mars and Saturn have rings.
Amino acids are the monomers that make up proteins. Amino acids are made of a carboxyl group (Carbon, Oxygen, Hydrogen), an amino group (Nitrogen and two Hydrogen), and finally an R group which differs in each amino acid. That R group is what makes each amino acid different! They can also act as enzymes. Essentially enzymes act as biological catalysts and control the functions of the cell and build cells.
1. photosynthesis
2. algae
3. chlorophyll
4. herbivore
Answer:
concrete slate clay oak
Explanation:
there you go buddy i understand the stress
