( ( While ( ( many insects ) ( have ( ( a ( four ( stage ( life cycle ) ) ) ) ( -LRB- ( ( complete metamorphosis ) -RRB- ) ) ) ) ) ) ( , ( these ( ( undergo ( ( a ( three ( stage ( life cycle ) ) ) ) ( called ( gradual metamorphosis ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN While) (S (NP (JJ many) (NNS insects)) (VP (VBP have) (NP (NP (DT a) (CD four) (NN stage) (NN life) (NN cycle)) (PRN (-LRB- -LRB-) (NP (JJ complete) (NNS metamorphosis)) (-RRB- -RRB-)))))) (, ,) (NP (DT these)) (VP (VBP undergo) (SBAR (S (NP (DT a) (CD three) (NN stage) (NN life) (NN cycle)) (VP (VBD called) (NP (JJ gradual) (NNS metamorphosis)))))) (. .)))
While many insects have a four stage life cycle (complete metamorphosis), these undergo a three stage life cycle called gradual metamorphosis.
(ROOT (S (NP (NNS Cells)) (VP (VBP have) (NP (CD four) (NNS cycles))) (. .)))