2. Which of the following nucleotide bases are BOTH pyrimidines?
A. cytosine and adenine
B. cytosine and guanine
C. thymine and guanine
D. uracil and adenine
E. cytosine and uracil

E. cytosine and uracil  

Explanation:

Pyrimidine is an aromatic compound similar to pyridine. The difference is that it has two nitrogen atoms at positions 1 and 3 in the ring.

The pyrimidine bases have the same six-membered ring structure with two N atoms at the 1,3-positions.

In addition, cytosine has a carbonyl and an amino group, while uracil has two carbonyl groups.

silt loam

hope this

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added