( Evolution ( ( is ( ( the change ) ( in ( ( heritable traits ) ( of ( ( biological organisms ) ( over ( ( successive generations ) ( due ( to ( ( ( natural selection ) and ) ( other mechanisms ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Evolution)) (VP (VBZ is) (NP (NP (DT the) (NN change)) (PP (IN in) (NP (NP (JJ heritable) (NNS traits)) (PP (IN of) (NP (NP (JJ biological) (NNS organisms)) (PP (IN over) (NP (NP (JJ successive) (NNS generations)) (ADJP (JJ due) (PP (TO to) (NP (NP (JJ natural) (NN selection)) (CC and) (NP (JJ other) (NNS mechanisms))))))))))))) (. .)))
Evolution is the change in heritable traits of biological organisms over successive generations due to natural selection and other mechanisms.
(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))))))))) (. .)))