( ( lack cell ) ( ( ( nucleus , ) ( as ( ( do ( all prokaryotes ) ) ( -LRB- ( ( eukaryotes ( have nucleus ) ) -RRB- ) ) ) ) ) . ) )
(ROOT (S (NP (NN lack) (NN cell)) (VP (VBZ nucleus) (, ,) (SBAR (IN as) (S (VP (VBP do) (S (NP (DT all)) (ADJP (JJ prokaryotes))) (PRN (-LRB- -LRB-) (S (NP (NNS eukaryotes)) (VP (VBP have) (NP (NN nucleus)))) (-RRB- -RRB-)))))) (. .)))
lack cell nucleus, as do all prokaryotes (eukaryotes have nucleus).
(ROOT (S (NP (NP (DT The) (NNS cells)) (PP (IN of) (NP (DT all) (NNS protists)))) (VP (VBP have) (NP (DT a) (NN nucleus))) (. .)))