( ( By ( comparing ( ( ( genomes ( of ( unicellular ( -LRB- ( ( ( e.g. , ) yeast ) -RRB- ) ) ) ) ) and ) ( ( multicellular ( -LRB- ( ( ( e.g. , ) nematode ) -RRB- ) ) ) organisms ) ) ) ) ( , ( we ( ( can ( ( segregate genes ) ( into ( ( ( ( those ( that ( have ( ( specific roles ) ( in ( multicellular systems ) ) ) ) ) ) , ) and ) ( those ( that ( ( carry out ) ( ( fundamental processes ) ( common ( to ( both ( unicellular ( and ( multicellular organisms ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN By) (S (VP (VBG comparing) (NP (NP (NP (NNS genomes)) (PP (IN of) (NP (NP (NN unicellular)) (PRN (-LRB- -LRB-) (NP (NNP e.g.)) (, ,) (NP (NN yeast)) (-RRB- -RRB-))))) (CC and) (NP (NP (NN multicellular)) (PRN (-LRB- -LRB-) (NP (NNP e.g.)) (, ,) (NP (NNP nematode)) (-RRB- -RRB-)) (NP (NNS organisms))))))) (, ,) (NP (PRP we)) (VP (MD can) (VP (VB segregate) (NP (NNS genes)) (PP (IN into) (NP (NP (NP (DT those)) (SBAR (WHNP (WDT that)) (S (VP (VBP have) (NP (NP (JJ specific) (NNS roles)) (PP (IN in) (NP (NN multicellular) (NNS systems)))))))) (, ,) (CC and) (NP (NP (DT those)) (SBAR (WHNP (WDT that)) (S (VP (VBP carry) (PRT (RP out)) (NP (NP (JJ fundamental) (NNS processes)) (ADJP (JJ common) (PP (TO to) (NP (DT both) (NN unicellular) (CC and) (NN multicellular) (NNS organisms))))))))))))) (. .)))
By comparing genomes of unicellular (e.g., yeast) and multicellular (e.g., nematode) organisms, we can segregate genes into those that have specific roles in multicellular systems, and those that carry out fundamental processes common to both unicellular and multicellular organisms.
(ROOT (S (S (NP (JJ Single-celled) (NNS organisms) (CC and) (NN multicellular) (NNS organisms)) (VP (VBP have) (NP (NP (DT this)) (PP (IN in) (NP (JJ common)))))) (: :) (S (NP (DT both)) (VP (VBP have) (NP (DT a) (NN way) (S (VP (TO to) (VP (VB get) (ADJP (JJ rid)) (PP (IN of) (NP (NN waste) (NNS materials))))))))) (. .)))