Question

If the DNA molecule is so similar among all living things (the pairings are always the same and that there are only six components that make up DNA), why is there so much diversity of life?

Answer 1

because every arrangement of the bases in the DNA strand result in a different protein, thus making different genes, and there is an infinite number of arrangements nitrogen bases can exists in the DNA

Answer 2

The correct answer would be "change in the nucleotide sequence of the DNA".

The structure and components of DNA are almost the same among all living organisms however, the nucleotide sequence of the DNA is not identical in any organisms (except zygotic twins and asexual reproduction).

This nucleotide sequence codes for the amino acid sequence of the polypeptide chain. The amino acid sequence regulated the structure and function of the protein.

Thus, ultimately a sequence of the DNA regulates the protein and phenotype of an individual.

Ultimately, the variation in the nucleotide sequence of DNA results in the biodiversity we see around us.