Answer: is this an question
Explanation:
I think it is B and A sorry if wrong
Protons electrons and newtrons
<span>The protons and neutrons are located in the nucleus of the atom</span>
<span>Eukaryotic and prokaryotic</span>
The importance of the semi-conservative model is unhealthy old and new genes cancel each other. The result new cells are disease and mutation free. ... DNA replication is semiconservative because DNA is composed of two complementary strands, each of which acts as template to construct a new strand complementary to itself.