( ( ( ( ( bacterium -RRB- ) ( ( ( ( Tiny , ) unicellular ) , ) ( ( prokaryotic organisms ) ( that ( reproduce ( by ( cell division ) ) ) ) ) ) ) and ) ( usually ( have ( cell walls ) ) ) ) ; )
(ROOT (S (VP (VP (VB bacterium) (-RRB- -RRB-) (NP (NP (NP (NNP Tiny)) (, ,) (NP (NN unicellular))) (, ,) (NP (NP (JJ prokaryotic) (NNS organisms)) (SBAR (WHNP (WDT that)) (S (VP (VB reproduce) (PP (IN by) (NP (NN cell) (NN division))))))))) (CC and) (VP (ADVP (RB usually)) (VB have) (NP (NN cell) (NNS walls)))) (: ;)))
bacterium) Tiny, unicellular, prokaryotic organisms that reproduce by cell division and usually have cell walls;
(ROOT (S (NP (DT A) (JJ single-celled) (NN prokaryotic)) (VP (VBZ is) (NP (DT a) (NNS bacteria))) (. .)))