( ( Prokaryotic cells ) ( ( ( do not ) ( have ( a nucleus ) ) ) . ) )
(ROOT (S (NP (JJ Prokaryotic) (NNS cells)) (VP (VBP do) (RB not) (VP (VB have) (NP (DT a) (NN nucleus)))) (. .)))
Prokaryotic cells do not have a 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))) (. .)))