( ( Plant cells ) ( ( have ( structures ( ( ( that animal ) cells ) lack ) ) ) . ) )
(ROOT (S (NP (NNP Plant) (NNS cells)) (VP (VBP have) (NP (NP (NNS structures)) (SBAR (WHNP (WDT that) (NN animal) (NNS cells)) (S (VP (VBP lack)))))) (. .)))
Plant cells have structures that animal cells lack.
(ROOT (S (NP (DT A) (NN cell) (NN wall)) (VP (VBZ is) (RB not) (ADJP (JJ present) (PP (IN in) (NP (NN animal) (NNS cells))))) (. .)))