( ( On ( a ( cellular level ) ) ) ( this ( ( is ( called ( cellular respiration ) ) ) . ) ) )
(ROOT (S (PP (IN On) (NP (DT a) (JJ cellular) (NN level))) (NP (DT this)) (VP (VBZ is) (VP (VBN called) (NP (JJ cellular) (NN respiration)))) (. .)))
On a cellular level this is called cellular respiration .
(ROOT (S (NP (PRP You)) (VP (VBP call) (NP (NP (JJ cellular) (NN respiration)) (SBAR (WHNP (WDT that)) (S (VP (VBZ does) (RB not) (VP (VB need) (NP (NN oxygen)) (S (VP (TO to) (VP (VB proceed) (NP (JJ anaerobic) (NN respiration))))))))))) (. .)))