Essential amino acids are amino acids that must be obtained through the diet. Non‑essential amino acids can be made biosynthetically. Classify the amino acids into either essential or non‑essential amino acids.

Yes yes yes very good

Yes yes yes very good

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.

I'm guessing that it's referencing the common folk or people of town or the people who are in the middle of the social and economical hierarchy