Choose the most appropriate statement that matches each term.
-protocells

A)energy source of the first living organisms
B)simple transitional forms between early organic compounds and the first living cells
C)have similar genes for energy metabolism to eukaryotes
D)first organisms with the noncyclic pathway of photosynthesis
E)store DNA wrapped around histones, like eukaryotes
F)in eukaryotes, indicated by a mix of bacterial and archaeal traits
G)rocky structures containing fossil remains of photoautotrophic bacteria
H)RNAs that function as enzymes
I)all living organisms descended from this prokaryotic, anaerobic ancestral species