Make a sketch of the double helix of dna. show how it unzips for replication and how complementary strands are built. label the nitrogenous bases, dna polymerase, the original strand, and the new strand.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

check for the pregnancy rating of drug. if its class c or d see if other alternatives