( however ( , ( ( facultative ( anaerobic organisms ) ) ( ( will ( both ( ( ferment and ) ( ( undergo respiration ) ( in ( ( the presence ) ( of oxygen ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB however)) (, ,) (NP (JJ facultative) (JJ anaerobic) (NNS organisms)) (VP (MD will) (VP (DT both) (VP (VB ferment)) (CC and) (VP (VB undergo) (NP (NN respiration)) (PP (IN in) (NP (NP (DT the) (NN presence)) (PP (IN of) (NP (NN oxygen)))))))) (. .)))
however, facultative anaerobic organisms will both ferment and undergo respiration in the presence of oxygen.
(ROOT (S (NP (PRP You)) (VP (VBP call) (NP (NP (NNS prokaryotes)) (SBAR (WHNP (WDT that)) (S (VP (VBP do) (RB not) (VP (VB need) (NP (NN oxygen)) (PP (IN for) (NP (NN respiration) (NN anaerobic))))))))) (. .)))