( ( ( the ( life cycle ) ) ( of ( a ( single organism ) ) ) ) ; )
(ROOT (NP (NP (DT the) (NN life) (NN cycle)) (PP (IN of) (NP (DT a) (JJ single) (NN organism))) (: ;)))
the life cycle of a single  organism;
(ROOT (S (NP (NNP Life) (NN cycle)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (NP (DT the) (NN span)) (PP (IN in) (NP (NP (DT the) (NN life)) (PP (IN of) (NP (NP (DT an) (NN organism)) (PP (IN from) (NP (NP (CD one) (NN generation)) (PP (TO to) (NP (DT the) (JJ next))))))))))))) (. .)))