( ( ( understand ( ( the ( basic mechanisms ) ) ( of ( passive transport ) ) ) ) ( through ( the ( cell membrane ) ) ) ) ; )
(ROOT (S (VP (VB understand) (NP (NP (DT the) (JJ basic) (NNS mechanisms)) (PP (IN of) (NP (JJ passive) (NN transport)))) (PP (IN through) (NP (DT the) (NN cell) (NN membrane)))) (: ;)))
understand the basic mechanisms of passive transport through the cell membrane;
(ROOT (S (NP (NNP Passive) (NN transport)) (VP (VBZ occurs) (SBAR (WHADVP (WRB when)) (S (NP (NNS substances)) (VP (VBP cross) (NP (DT the) (NN plasma) (NN membrane)) (PP (IN without) (NP (NP (DT any) (NN input)) (PP (IN of) (NP (NN energy))))) (PP (IN from) (NP (DT the) (NN cell))))))) (. .)))