( ( Natural selection ) ( ( ( ( allows organisms ) ( with adaptations ) ) ( to ( ( reproduce ( more successfully ) ) ( than ( those ( lacking ( a trait ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Natural) (NN selection)) (VP (VBZ allows) (NP (NNS organisms)) (PP (IN with) (NP (NNS adaptations))) (S (VP (TO to) (VP (VB reproduce) (ADVP (RBR more) (RB successfully)) (PP (IN than) (S (NP (DT those)) (VP (VBG lacking) (NP (DT a) (NN trait))))))))) (. .)))
Natural selection allows organisms with adaptations to reproduce more successfully than those lacking a trait.
(ROOT (S (NP (JJ Natural) (NN selection)) (VP (VBZ is) (NP (NP (DT the) (NN process)) (SBAR (WHNP (WDT that)) (S (VP (VBZ allows) (NP (NNS organisms)) (PP (IN with) (NP (JJR better) (NNS traits) (S (VP (TO to) (VP (VB survive) (CC and) (VB produce))))))))))) (. .)))