Create a Punnett square showing a cross between the two F1 parent plants. Their offspring are the F2 generation.

the answer to your question is:

c. complementary base-pairing

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.

not sure if this is what you'r looking for eubacteria and archaebacteria