( Evolution ( ( can ( ( act only ) ( on ( traits ( that ( are ( ( passed ( genetically ( from ( one generation ) ) ) ) ( to ( the next ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Evolution)) (VP (MD can) (VP (VB act) (ADVP (RB only)) (PP (IN on) (NP (NP (NNS traits)) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (VP (VBN passed) (S (ADJP (RB genetically) (PP (IN from) (NP (CD one) (NN generation))))) (PP (TO to) (NP (DT the) (JJ next))))))))))) (. .)))
Evolution can act only on traits that are passed genetically from one generation to the next.
(ROOT (S (NP (NNP Evolution)) (VP (VBZ occurs) (SBAR (WHADVP (WRB when)) (S (NP (NNS organisms)) (VP (VB acquire) (CC and) (VB pass) (PP (IN on) (NP (JJ new) (NNS traits))) (PP (IN from) (NP (NP (CD one) (NN generation)) (PP (TO to) (NP (DT the) (JJ next) (NN generation))))))))) (. .)))