( ( Since ( ( the cell ) ( ( ( is ( ( the ( basic unit ) ) ( of ( all ( living things ) ) ) ) ) and ) ( can ( perform ( all ( the ( life activities ) ) ) ) ) ) ) ) . )
(ROOT (FRAG (SBAR (IN Since) (S (NP (DT the) (NN cell)) (VP (VP (VBZ is) (NP (NP (DT the) (JJ basic) (NN unit)) (PP (IN of) (NP (DT all) (VBG living) (NNS things))))) (CC and) (VP (MD can) (VP (VB perform) (NP (PDT all) (DT the) (NN life) (NNS activities))))))) (. .)))
Since the cell is the basic unit of all living things and can perform all the life activities.
(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))))))))))) (. .)))