( Reproduction ( ( ( ( ( takes place ) ( by fission ) ) , ) ( with ( open mitosis ) ) ) . ) )
(ROOT (S (NP (NNP Reproduction)) (VP (VBZ takes) (NP (NN place)) (PP (IN by) (NP (NN fission))) (, ,) (PP (IN with) (NP (JJ open) (NNS mitosis)))) (. .)))
Reproduction takes place by fission, with open mitosis.
(ROOT (S (NP (NNP Fission)) (VP (VBZ takes) (NP (NP (NN place)) (SBAR (WHADVP (WRB when)) (S (NP (DT an) (NN animal)) (ADVP (RB simply)) (VP (VBZ divides) (PP (IN into) (NP (CD two) (NNS parts)))))))) (. .)))