( ( ( ( ( ( SECTION 9.2 ) Mutations ) , ) ( which ( can ( be ( either ( ( spontaneous or ) induced ) ) ) ) ) ) , ) ( ( arise ( because ( ( of ( changes ( in ( the base ) ) ) ) ( ( sequence ( of ( ( the ( nucleic acid ) ) ( of ( an organism ) ) ) ) ) ( s genome ) ) ) ) ) . ) )
(ROOT (S (NP (NP (QP (CD SECTION) (CD 9.2)) (NNS Mutations)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (MD can) (VP (VB be) (ADJP (DT either) (JJ spontaneous) (CC or) (JJ induced)))))) (, ,)) (VP (VBP arise) (SBAR (IN because) (S (PP (IN of) (NP (NP (NNS changes)) (PP (IN in) (NP (DT the) (NN base))))) (NP (NP (NN sequence)) (PP (IN of) (NP (NP (DT the) (JJ nucleic) (NN acid)) (PP (IN of) (NP (DT an) (NN organism)))))) (VP (VBZ s) (ADJP (JJ genome)))))) (. .)))
SECTION 9.2 Mutations, which can be either spontaneous or induced, arise because of changes in the base sequence of the nucleic acid of an organism s genome.
(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)))))))) (. .)))