Answer:
1. Purines
2. States that DNA composition varies among species
3. Hydrogen Bond
4. Purines
<em>Answer to #2 is a little iffy </em>-- sorry
Explanation:
Pyrmidines have two rings
Purines have one ring
Complementary bases are connected by hydrogen bonds.
Abundant amount of amino acids made up a polypeptide
It controls all the involuntary actions like digestion and beating of our heart
Parietal cells produce the acid
The answer would be m<span>ycoplasmas. These type of organisms are very unique, because their membrane lacks a cell wall.</span>