( ( As ( prokaryotes ( -LRB- ( ( organisms ( without ( a ( cell nucleus ) ) ) ) -RRB- ) ) ) ) ( ( all bacteria ) ( ( have ( ( a ( ( relatively simple ) ( cell structure ) ) ) ( lacking ( ( ( a ( cell nucleus ) ) and ) ( organelles ( such ( as ( ( mitochondria and ) chloroplasts ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN As) (NP (NP (NNS prokaryotes)) (PRN (-LRB- -LRB-) (NP (NP (NNS organisms)) (PP (IN without) (NP (DT a) (NN cell) (NN nucleus)))) (-RRB- -RRB-)))) (NP (DT all) (NNS bacteria)) (VP (VBP have) (NP (NP (DT a) (ADJP (RB relatively) (JJ simple)) (NN cell) (NN structure)) (VP (VBG lacking) (NP (NP (DT a) (NN cell) (NN nucleus)) (CC and) (NP (NP (NNS organelles)) (PP (JJ such) (IN as) (NP (NN mitochondria) (CC and) (NNS chloroplasts)))))))) (. .)))
As prokaryotes (organisms without a cell nucleus) all bacteria have a relatively simple cell structure lacking a cell nucleus and organelles such as mitochondria and chloroplasts .
(ROOT (S (NP (NP (DT The) (NNS cells)) (PP (IN of) (NP (DT all) (NNS protists)))) (VP (VBP have) (NP (DT a) (NN nucleus))) (. .)))