( ( Can ( ( make ( ATP ( ( ( by ( fermentation ( in ( ( the absence ) ( of oxygen ) ) ) ) ) or ) ( by respiration ) ) ) ) ( in ( ( the presence ) ( of oxygen ) ) ) ) ) . )
(ROOT (S (VP (MD Can) (VP (VB make) (NP (NP (NNP ATP)) (PP (PP (IN by) (NP (NP (NN fermentation)) (PP (IN in) (NP (NP (DT the) (NN absence)) (PP (IN of) (NP (NN oxygen))))))) (CC or) (PP (IN by) (NP (NN respiration))))) (PP (IN in) (NP (NP (DT the) (NN presence)) (PP (IN of) (NP (NN oxygen))))))) (. .)))
Can make ATP by fermentation in the absence of oxygen or by respiration in the presence of oxygen.
(ROOT (S (NP (NNP Fermentation)) (VP (VBZ is) (NP (NP (DT the) (NN process)) (PP (IN of) (S (VP (VBG making) (NP (NN atp)) (PP (IN without) (NP (NN oxygen)))))))) (. .)))