( ( ( All cells ) ( in ( the organ ) ) ) ( ( can ( be ( ( traced back ) ( to ( this cell ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT All) (NNS cells)) (PP (IN in) (NP (DT the) (NN organ)))) (VP (MD can) (VP (VB be) (VP (VBN traced) (PRT (RP back)) (PP (TO to) (NP (DT this) (NN cell)))))) (. .)))
All cells in the organ can be traced back to this cell.
(ROOT (S (NP (DT A) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN cell)) (VP (VBZ is) (NP (NP (DT the) (JJS lowest) (NN level)) (PP (IN of) (NP (NN organism))) (SBAR (WHNP (WDT that)) (S (VP (MD can) (VP (VB perform) (NP (NP (DT all) (NNS activities)) (VP (VBN required) (PP (IN for) (NP (NN life))))))))))) (. .)))