( ( Both ( single ( cells ( and ( multicellular organisms ) ) ) ) ) ( ( have ( molecules ( that ( help ( to ( ( keep ( ( the ( cells ' ) ) acidity ) ) ( within ( the ( necessary range ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT Both) (JJ single) (NNS cells) (CC and) (NN multicellular) (NNS organisms)) (VP (VBP have) (NP (NP (NNS molecules)) (SBAR (WHNP (WDT that)) (S (VP (VBP help) (S (VP (TO to) (VP (VB keep) (NP (NP (DT the) (NNS cells) (POS ')) (NN acidity)) (PP (IN within) (NP (DT the) (JJ necessary) (NN range))))))))))) (. .)))
Both single cells and multicellular organisms have molecules that help to keep the cells' acidity within the necessary range.
(ROOT (S (S (NP (JJ Single-celled) (NNS organisms) (CC and) (NN multicellular) (NNS organisms)) (VP (VBP have) (NP (NP (DT this)) (PP (IN in) (NP (JJ common)))))) (: :) (S (NP (DT both)) (VP (VBP have) (NP (DT a) (NN way) (S (VP (TO to) (VP (VB get) (ADJP (JJ rid)) (PP (IN of) (NP (NN waste) (NNS materials))))))))) (. .)))