( ( Fitness traits ) ( ( ( relate ( to ( an ( animal ( s ability ) ) ) ) ) ( to ( ( survive and ) reproduce ) ) ) . ) )
(ROOT (S (NP (NNP Fitness) (NNS traits)) (VP (VBP relate) (PP (TO to) (NP (DT an) (NN animal) (NN s) (NN ability))) (S (VP (TO to) (VP (VB survive) (CC and) (VB reproduce))))) (. .)))
Fitness traits relate to an animal s ability to survive and reproduce.
(ROOT (S (NP (DT The) (NN term) (NN fitness)) (VP (VBZ describes) (NP (NP (DT the) (JJ overall) (NN ability)) (PP (IN of) (NP (DT an) (NN animal) (S (VP (TO to) (VP (VB survive) (CC and) (VB produce) (NP (NN offspring))))))))) (. .)))