( ( Groups ( of ( Hormones ( Plant hormones ) ) ) ) ( ( are ( ( chemical messengers ) ( that ( affect ( ( a ( plant 's ) ) ( ability ( to ( respond ( to ( its environment ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNS Groups)) (PP (IN of) (NP (NNP Hormones) (NNP Plant) (NNS hormones)))) (VP (VBP are) (NP (NP (NN chemical) (NNS messengers)) (SBAR (WHNP (WDT that)) (S (VP (VBP affect) (NP (NP (DT a) (NN plant) (POS 's)) (NN ability) (S (VP (TO to) (VP (VB respond) (PP (TO to) (NP (PRP$ its) (NN environment)))))))))))) (. .)))
Groups of Hormones Plant hormones are chemical messengers that affect a plant's ability to respond to its environment.
(ROOT (S (NP (NP (NNS Receptors)) (PP (IN for) (NP (NNS hormones)))) (VP (VP (VBP recognize) (NP (NNS molecules)) (PP (IN with) (NP (JJ specific) (NNS shapes) (CC and) (NN side) (NNS groups)))) (, ,) (CC and) (VP (VBP respond) (ADVP (RB only)) (PP (TO to) (NP (NP (DT those)) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (VP (VBN recognized))))))))) (. .)))