( ( Natural selection ) ( ( is ( ( a process ) ( ( by which ) ( ( organisms ( with ( traits ( that ( best ( fit ( their environment ) ) ) ) ) ) ) ( are ( most ( likely ( to ( ( ( ( ( survive , ) reproduce ) , ) and ) ( ( pass ( on ( their genes ) ) ) ( to ( the ( next generation ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Natural) (NN selection)) (VP (VBZ is) (NP (NP (DT a) (NN process)) (SBAR (WHPP (IN by) (WHNP (WDT which))) (S (NP (NP (NNS organisms)) (PP (IN with) (NP (NP (NNS traits)) (SBAR (WHNP (WDT that)) (S (ADVP (RB best)) (VP (VBP fit) (NP (PRP$ their) (NN environment)))))))) (VP (VBP are) (ADJP (RBS most) (JJ likely) (S (VP (TO to) (VP (VP (VB survive)) (, ,) (VP (VB reproduce)) (, ,) (CC and) (VP (VB pass) (PP (IN on) (NP (PRP$ their) (NNS genes))) (PP (TO to) (NP (DT the) (JJ next) (NN generation))))))))))))) (. .)))
Natural selection is a process by which organisms with traits that best fit their environment are most likely to survive, reproduce, and pass on their genes to the next generation.
(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))))))))))) (. .)))