Answer: Adenine, Guanine, Thymine or Uracil and Cytosine
Explanation: Nitrogenous bases are one of the major constituents of nucleic acids. They contain nitrogen and act as bases in reactions.
1.Scaly skin. This keeps the animal from losing too much water to the environment.
2. <span>Shelled
amniotic egg. This allows the egg to incubate on land without drying
out, allowing the adults greater range on land than would be the case if
they had to return to water to lay eggs. </span>
False! it has more salt in it than fresh water. except its still not enough to be salt water
hope i helped -beanz