( ( ( 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 (SBAR (WHADVP (WRB When)) (S (NP (NNS substances)) (VP (VBP pass) (PP (IN through) (NP (DT the) (NN cell) (NN membrane))) (PP (IN without) (S (VP (VBG needing) (NP (DT any) (NN energy)))))))) (, ,) (NP (PRP it)) (VP (VBZ is) (VP (VBN called) (NP (JJ passive) (NN transport)))) (. .)))