( ( ( ( Darwin 's ) theory ) ( of ( natural selection ) ) ) ( ( argued ( that ( ( ( the organism ) ( that ( possesses ( traits ( that ( help ( it ( to ( ( cope successfully ) ( with ( its environment ) ) ) ) ) ) ) ) ) ) ) ( is ( ( the one ) ( that ( ( ( ( survives and ) passes ) ( its genes ) ) ( on ( to ( its offspring ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NP (NNP Darwin) (POS 's)) (NN theory)) (PP (IN of) (NP (JJ natural) (NN selection)))) (VP (VBD argued) (SBAR (IN that) (S (NP (NP (DT the) (NN organism)) (SBAR (WHNP (WDT that)) (S (VP (VBZ possesses) (NP (NP (NNS traits)) (SBAR (WHNP (WDT that)) (S (VP (VBP help) (S (NP (PRP it)) (VP (TO to) (VP (VB cope) (ADVP (RB successfully)) (PP (IN with) (NP (PRP$ its) (NN environment)))))))))))))) (VP (VBZ is) (NP (NP (DT the) (NN one)) (SBAR (WHNP (WDT that)) (S (VP (VBZ survives) (CC and) (VBZ passes) (NP (PRP$ its) (NNS genes)) (PP (IN on) (PP (TO to) (NP (PRP$ its) (NN offspring)))))))))))) (. .)))
Darwin's theory of natural selection argued that the organism that possesses traits that help it to cope successfully with its environment is the one that survives and passes its genes on to its offspring.
(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))))))))))) (. .)))