( They ( ( are ( found ( in ( ( ( eukaryotic and ) prokaryotic ) cells ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBP are) (VP (VBN found) (PP (IN in) (NP (ADJP (JJ eukaryotic) (CC and) (JJ prokaryotic)) (NNS cells))))) (. .)))
They are found in eukaryotic and prokaryotic cells.
(ROOT (S (NP (NP (DT The) (JJ main) (NN difference)) (PP (IN between) (NP (ADJP (JJ eukaryotic) (CC and) (JJ prokaryotic)) (NNS cells)))) (VP (VBZ is) (SBAR (IN that) (S (NP (JJ eukaryotic) (NNS cells)) (VP (VBP have) (NP (DT a) (NN nucleus)))))) (. .)))