( It ( ( was ( ( ( not ( recombinogenic ( to yeast ) ) ) but ) ( induced ( ( DNA ( ( damage and ) mutation ) ) ( in bacteria ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBD was) (UCP (ADJP (RB not) (JJ recombinogenic) (PP (TO to) (NP (NN yeast)))) (CC but) (VP (VBN induced) (NP (NP (NNP DNA) (NN damage) (CC and) (NN mutation)) (PP (IN in) (NP (NNS bacteria))))))) (. .)))
It was not recombinogenic to yeast but 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)))))))) (. .)))