Are most of the deserts shown in the south western or north western part of the u. s?

Ibelieve is d but i’m not 100% sure

There are four nitrogenous bases that make up dna. the two pyramidines are thymine and cytosine. the two purines are adenine and guanine. these bases pair in a very specific way. adenine - thymineguanine - cytosine i remember it like this: a tall, good cat.