Question

The study and manipulation of DNA on a molecular level is known as
Select one:
a. evolution.
b. genomes.
c. biochemistry.
d. molecular genetics.

Answer 1

D. Molecular Genetics

The study and manipulation of DNA on a molecular level is known as molecular genetics because it is done on a "molecular" level and because genetics has to do with the study of genes and DNA.

Hope this helps :)

Answer 2

It's called molecular genetics. :) 

Because it's on a molecular level and DNA contains important genetic information.