Adenine and guanine have a fused-ring skeletal structure derived of purine, hence they are called purine bases. ... Similarly, the simple-ring structure of cytosine, uracil, and thymine is derived of pyrimidine, so those three bases are called the pyrimidine bases.
There are many different factors, but some are: the amount of natural resources (food, water, etc.), amount of predator/prey, and availability of shelter.
Enzymes are proteins that speed up chemical reactions without being used up.
Cancer cells multiply rapidly and normal cells don't.
Hi , matter is made of single particles called atoms and is any substance that has either mass or volume.
