( ( All reptiles ) ( ( ( ( grow ( throughout ( their lives ) ) ) and ) ( are ( ( ( ( ectothermic , ) or ) ( dependent ( on ( external heat ) ) ) ) ( for ( regulating ( body temperature ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT All) (NNS reptiles)) (VP (VP (VBP grow) (PP (IN throughout) (NP (PRP$ their) (NNS lives)))) (CC and) (VP (VBP are) (ADJP (ADJP (JJ ectothermic)) (, ,) (CC or) (ADJP (JJ dependent) (PP (IN on) (NP (JJ external) (NN heat)))) (PP (IN for) (S (VP (VBG regulating) (NP (NN body) (NN temperature)))))))) (. .)))
All reptiles grow throughout their lives and are ectothermic, or dependent on external heat for regulating body temperature.
(ROOT (S (NP (NNS Reptiles)) (VP (VBP are) (VP (VBN described) (PP (IN by) (NP (NP (DT the) (NN term) (NN ectothermic)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ means) (SBAR (S (NP (PRP$ their) (JJ internal) (NN temperature)) (VP (VBZ depends) (PP (IN on) (NP (NP (DT the) (NN temperature)) (PP (IN of) (NP (PRP$ their) (NN environment))))))))))))))) (. .)))
Reptiles are described by the term ectothermic, which means their internal temperature depends on the temperature of their environment.