( ( Be ( able ( to ( ( ( ( trace ( energy flows ) ) ( through ( ecosystems ( in ( one direction ) ) ) ) ) , ) ( from ( ( photosynthetic organisms ) ( to ( herbivores ( to ( ( carnivores and ) decomposers ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB Be) (ADJP (JJ able) (S (VP (TO to) (VP (VB trace) (NP (NN energy) (NNS flows)) (PP (IN through) (NP (NP (NNS ecosystems)) (PP (IN in) (NP (CD one) (NN direction))))) (, ,) (PP (IN from) (NP (NP (JJ photosynthetic) (NNS organisms)) (PP (TO to) (NP (NP (NNS herbivores)) (PP (TO to) (NP (NNS carnivores) (CC and) (NNS decomposers)))))))))))) (. .)))
Be able to trace energy flows through ecosystems in one direction, from photosynthetic organisms to herbivores to carnivores and decomposers.
(ROOT (S (NP (DT A) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN carnivore)) (VP (VBZ is) (PP (IN at) (NP (NP (DT the) (NN top)) (PP (IN of) (NP (DT the) (NN energy) (NN pyramid)))))) (. .)))