( ( ( The species ) ( with ( the ( stronger characteristics ) ) ) ) ( ( ( mate and ) ( ( pass ( the traits ) ) ( on ( in ( ( the process ) ( called ( natural selection ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN species)) (PP (IN with) (NP (DT the) (JJR stronger) (NNS characteristics)))) (VP (VP (VB mate)) (CC and) (VP (VB pass) (NP (DT the) (NNS traits)) (PP (IN on) (IN in) (NP (NP (DT the) (NN process)) (VP (VBN called) (NP (JJ natural) (NN selection))))))) (. .)))
The species with the stronger characteristics mate and pass the traits on in the process called natural selection .
(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))))))))))) (. .)))