( ( At ( a ( molecular level ) ) ) ( , ( ( the ( term mutation ) ) ( ( describes ( ( a change ) ( in ( sequence ( of ( nucleotides ( in ( the ( chromosonal DNA ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN At) (NP (DT a) (JJ molecular) (NN level))) (, ,) (NP (DT the) (NN term) (NN mutation)) (VP (VBZ describes) (NP (NP (DT a) (NN change)) (PP (IN in) (NP (NP (NN sequence)) (PP (IN of) (NP (NP (NNS nucleotides)) (PP (IN in) (NP (DT the) (JJ chromosonal) (NN DNA))))))))) (. .)))
At a molecular level, the term mutation describes a change in sequence of nucleotides in the chromosonal DNA.
(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)))))))) (. .)))