( This ( ( happens ( in ( ( both ( ( eukaryotic and ) prokaryotic ) ) cells ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VBZ happens) (PP (IN in) (NP (ADJP (DT both) (JJ eukaryotic) (CC and) (JJ prokaryotic)) (NNS cells)))) (. .)))
This happens in both 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)))))) (. .)))