( ( ( ( ( Evolution ( occurs ( as ( ( the ( ( more successful ) adaptations ) ) ( become dominant ) ) ) ) ) , ) and ) ( ( former traits ) ( are ( ( bred out ) ( by ( the ( natural ( selection process ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNP Evolution)) (VP (VBZ occurs) (SBAR (IN as) (S (NP (DT the) (ADJP (RBR more) (JJ successful)) (NNS adaptations)) (VP (VBP become) (NP (JJ dominant))))))) (, ,) (CC and) (S (NP (JJ former) (NNS traits)) (VP (VBP are) (VP (VBN bred) (PRT (RP out)) (PP (IN by) (NP (DT the) (JJ natural) (NN selection) (NN process)))))) (. .)))
Evolution occurs as the more successful adaptations become dominant,              and former traits are bred out by the natural selection process.
(ROOT (S (NP (NNP Evolution)) (VP (VBZ occurs) (PP (IN by) (NP (NP (JJ natural) (NN selection)) (, ,) (NP (NP (DT a) (NN process)) (SBAR (WHADVP (WRB whereby)) (S (NP (JJ better-adapted) (NNS members)) (VP (VBP pass) (PRT (RP along)) (NP (PRP$ their) (NNS traits)) (, ,) (PP (VBG according) (PP (TO to) (NP (NN darwin))))))))))) (. .)))