( ( ( ( ( ( Chemical mutagens ) ( can ( cause ( ( rearrangements ( as ( well as ) ) ) ( point mutations ) ) ) ) ) , ) and ) ( likewise ( radiation ( can ( cause ( ( ( point mutations ) ( as ( well as ) ) ) rearrangements ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNP Chemical) (NNS mutagens)) (VP (MD can) (VP (VB cause) (NP (NP (NNS rearrangements)) (CONJP (RB as) (RB well) (IN as)) (NP (NN point) (NNS mutations)))))) (, ,) (CC and) (S (ADVP (RB likewise)) (NP (NN radiation)) (VP (MD can) (VP (VB cause) (NP (NP (NN point) (NNS mutations)) (CONJP (RB as) (RB well) (IN as)) (NP (NNS rearrangements)))))) (. .)))
Chemical mutagens can cause rearrangements as well as point mutations, and likewise radiation can cause point mutations as well as rearrangements.
(ROOT (S (NP (NNP Cancer)) (VP (VBZ is) (VP (VBN caused) (PP (IN by) (NP (NP (NNS mutations)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (MD can) (VP (VB be) (VP (VBN caused) (PP (IN by) (NP (NNS pathogens) (, ,) (NNS chemicals) (, ,) (CC or) (NN radiation)))))))))))) (. .)))