The DNA molecule is very similar among all living things. The pairings are always the same and there are only six components that make up DNA.

Why is there so much diversity of life?

The sequences of base pairs are different.

Organisms use DNA differently.

The sugar component of the nucleotides are different.

Organisms contain different types of DNA.

The correct answer is A.

Explanation:

Though animals may (or probably) be all linked by one source, organisms still have their own types of sequences in their DNA. Because of this, these form different species/organisms in the environment and create variety. For example if the DNA of a Red bird and a blue bird bred, it is possibly that they could create a newer variety of birds that could be a mixed species, having their own type of DNA, that is altered from the red and blue bird(s).

Hope this helped! :D

the answer is b.) hydrogen bonds between bases.