( ( Ectothermic animals ) ( ( ( ( ( ( are `` ) cold-blooded ) '' ) and ) ( must ( ( rely ( on ( ( an ( outside source ) ) ( of heat ) ) ) ) ( to ( regulate ( body ( temperature ( and ( activity levels ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Ectothermic) (NNS animals)) (VP (VP (VBP are) (`` ``) (ADJP (JJ cold-blooded)) ('' '')) (CC and) (VP (MD must) (VP (VB rely) (PP (IN on) (NP (NP (DT an) (JJ outside) (NN source)) (PP (IN of) (NP (NN heat))))) (S (VP (TO to) (VP (VB regulate) (NP (NN body) (NN temperature) (CC and) (NN activity) (NNS levels)))))))) (. .)))
Ectothermic animals are &quot;cold-blooded&quot; and must rely on an outside source of heat to regulate body temperature and activity levels.
(ROOT (S (NP (NNP Ectothermic)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (NP (NNS animals)) (SBAR (WHNP (WDT that)) (S (VP (MD can) (RB not) (VP (VB raise) (NP (PRP$ their) (NN body) (NN temperature)) (PP (IN on) (NP (PRP$ their) (JJ own))))))))))) (. .)))