The backbone of the double helix has an alternating molecules. what do you call these alternating molecule?

equal distribution i think.

scientists have discovered that hiv does not cause aids by the virus's direct effect on the host's immune cells, but rather through the cells' lethal influence on one another. researchers from the gladstone institutes have revealed that hiv does not cause aids by the virus's

the answer is c on e2020, bud.

i would think a oil tanker that has leaked in a bay