( It ( ( induced ( ( DNA ( ( damage and ) mutation ) ) ( in bacteria ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBN induced) (NP (NP (NNP DNA) (NN damage) (CC and) (NN mutation)) (PP (IN in) (NP (NNS bacteria))))) (. .)))
It induced DNA damage and mutation in bacteria.
(ROOT (S (NP (NNP Induced) (CC or) (NNP spontaneous)) (VP (VBP are) (NP (NP (DT the) (CD two) (NNS methods)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (NNS mutations)) (VP (VBP arise) (PP (IN in) (NP (NN dna)))))))) (. .)))