( ( Like ( other reptiles ) ) ( , ( they ( ( ( ( ( are ( ( ectothermic or ) cold-blooded ) ) , ) and ) ( can ( be ( observed ( basking ( in ( the ( sun ( to ( regulate ( their ( internal ( body temperature ) ) ) ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN Like) (NP (JJ other) (NNS reptiles))) (, ,) (NP (PRP they)) (VP (VP (VBP are) (ADJP (JJ ectothermic) (CC or) (JJ cold-blooded))) (, ,) (CC and) (VP (MD can) (VP (VB be) (VP (VBN observed) (S (VP (VBG basking) (PP (IN in) (NP (DT the) (NN sun) (S (VP (TO to) (VP (VB regulate) (NP (PRP$ their) (JJ internal) (NN body) (NN temperature))))))))))))) (. .)))
Like other reptiles, they are ectothermic or cold-blooded, and can be observed basking in the sun to regulate their internal 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.