Answer:
I believe it is A, but I could be wrong.
Explanation:
I think this, because when it says, "Other, less useful, versions of the genetic code were eliminated gradually throughout the course of evolution", I think it referencing to the fact that all animals and etc, are made up of common codes, and how over time, through evolution, certain codes were eliminated, because creatures were evolving.
Characteristic of the Vessel elements of Angiosperms
DNA is being used as a template to make a molecule of mRNA.
Yes, he does have family history of heart disease.
