( ( ( The diversity ) ( among organisms ) ) ( ( has ( arisen ( through ( ( mutations , ) ( which ( are ( changes ( in ( ( the structure ) ( of ( DNA molecules ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN diversity)) (PP (IN among) (NP (NNS organisms)))) (VP (VBZ has) (VP (VBN arisen) (PP (IN through) (NP (NP (NNS mutations)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBP are) (NP (NP (NNS changes)) (PP (IN in) (NP (NP (DT the) (NN structure)) (PP (IN of) (NP (NN DNA) (NNS molecules))))))))))))) (. .)))
The diversity among organisms has arisen through mutations , which are changes in the structure of DNA molecules.
(ROOT (S (NP (NNS Mutations)) (VP (VP (VBP are) (NP (NP (NNS changes)) (PP (TO to) (NP (NP (DT an) (NN organism) (POS 's)) (NN dna))))) (CC and) (VP (VBP are) (NP (NP (DT an) (JJ important) (NN driver)) (PP (IN of) (NP (NP (NN diversity)) (PP (IN in) (NP (NNS populations)))))))) (. .)))