( ( type ( of ( active transport ) ) ) ( ( in which ) ( substances ( are ( ( carried ( across ( the ( cell membrane ) ) ) ) ( by vesicles ) ) ) ) ) )
(ROOT (FRAG (NP (NP (NN type)) (PP (IN of) (NP (JJ active) (NN transport)))) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (NNS substances)) (VP (VBP are) (VP (VBN carried) (PP (IN across) (NP (DT the) (NN cell) (NN membrane))) (PP (IN by) (NP (NNS vesicles)))))))))
type of active transport in which substances are carried across the cell membrane by vesicles
(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))))))) (. .)))