( ( The stem ) ( ( holds ( ( ( ( the ( plant upright ) ) and ) ( ( food and ) water ) ) ( ( travel ( ( up and ) down ) ) ( the stem ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN stem)) (VP (VBZ holds) (S (NP (NP (DT the) (NN plant) (NN upright)) (CC and) (NP (NN food) (CC and) (NN water))) (VP (VB travel) (PRT (RP up) (CC and) (RP down)) (NP (DT the) (NN stem))))) (. .)))
The stem holds the plant upright and food and water travel up and down the stem.
(ROOT (S (NP (DT The) (NN stem)) (VP (VBZ is) (NP (NP (DT the) (JJ basic) (NN structure)) (SBAR (WHNP (WDT that)) (S (VP (VBZ holds) (S (NP (NNS plants)) (ADJP (JJ upright))) (, ,) (S (VP (VBG allowing) (NP (NNS plants)) (S (VP (TO to) (VP (VB get) (NP (NP (DT the) (NN sunlight) (CC and) (NN air)) (SBAR (S (NP (PRP they)) (VP (VBP need))))))))))))))) (. .)))