( ( heterotroph ( ( An organism ) ( that ( ( ( is ( incapable ( of ( synthesizing ( its ( own food ) ) ) ) ) ) and ) ( ( , ( therefore , ) ) ( must ( feed ( upon ( ( organic compounds ) ( produced ( by ( other organisms ) ) ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB heterotroph) (NP (NP (DT An) (NN organism)) (SBAR (WHNP (WDT that)) (S (VP (VP (VBZ is) (ADJP (JJ incapable) (PP (IN of) (S (VP (VBG synthesizing) (NP (PRP$ its) (JJ own) (NN food))))))) (CC and) (VP (PRN (, ,) (ADVP (RB therefore)) (, ,)) (MD must) (VP (VB feed) (PP (IN upon) (NP (NP (JJ organic) (NNS compounds)) (VP (VBN produced) (PP (IN by) (NP (JJ other) (NNS organisms))))))))))))) (. .)))
heterotroph An organism that is incapable of synthesizing its own food and, therefore, must feed upon organic compounds produced by other organisms.
(ROOT (S (NP (NNS Animals)) (VP (MD can) (RB not) (VP (VB produce) (NP (PRP$ their) (JJ own) (NN food)) (S (VP (VBG making) (S (NP (PRP them)) (ADJP (JJ heterotrophs)))))))))