( ( ( All ( the organisms ) ) ( that ( ( can not ) ( make ( their ( own food ) ) ) ) ) ) ( ( -LRB- ( and ( ( need producers ) -RRB- ) ) ) ( ( are ( called heterotrophs ) ) . ) ) )
(ROOT (S (NP (NP (PDT All) (DT the) (NNS organisms)) (SBAR (WHNP (WDT that)) (S (VP (MD can) (RB not) (VP (VB make) (NP (PRP$ their) (JJ own) (NN food))))))) (PRN (-LRB- -LRB-) (CC and) (S (VP (VB need) (NP (NNS producers)))) (-RRB- -RRB-)) (VP (VBP are) (VP (VBN called) (NP (NNS heterotrophs)))) (. .)))
All      the organisms that can not make their own food (and need producers) are called heterotrophs .
(ROOT (S (SBAR (IN Because) (S (NP (DT all) (NNS animals)) (VP (VBP require) (NP (NP (DT an) (JJ external) (NN source)) (PP (IN of) (NP (NN food))))))) (, ,) (NP (PRP they)) (VP (VBP are) (VP (VBN called) (S (ADJP (JJ heterotrophic))))) (. .)))