Question

Is the DNA of every single living thing made up of adenines, thymines, cytosines, and guanines? What does that say about all living organisms?

Answer 1

Yes, all living things are made up of the same four bases, This provides good evidence to support that all living things are related by a common ancestor. Over the course of millions of years, that ancestor mutated, and became the species we see today

Answer 2

The DNA (deoxyribonucleic acid) is a hereditary molecules, which is passed from one generation to another. A DNA molecule is made up nucleotides, each nucleotide is made of a sugar, a phosphate group and a nitrogenous base.

There are 4 types of nitrogenous bases present in the DNA, adenine, guanine, cytosine and thymine.

All the organism are made up of DNA only, which suggest that all the organism are derived from a single ancestor, as on the molecular level all the organism have a single type of molecules which determines all the traits in the organism.