( endotherms ( ( Animals ( that ( have ( the ( ability ( to ( ( maintain ( a ( constant ( body temperature ) ) ) ) ( over ( ( a ( wide range ) ) ( of ( environmental conditions ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS endotherms)) (VP (VBZ Animals) (SBAR (IN that) (S (VP (VBP have) (NP (DT the) (NN ability) (S (VP (TO to) (VP (VB maintain) (NP (DT a) (JJ constant) (NN body) (NN temperature)) (PP (IN over) (NP (NP (DT a) (JJ wide) (NN range)) (PP (IN of) (NP (JJ environmental) (NNS conditions))))))))))))) (. .)))
endotherms  Animals that have the ability to maintain a constant body temperature over a wide range of environmental conditions.
(ROOT (S (NP (NNS Endotherms)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (NP (NNS organisms)) (SBAR (WHNP (WDT that)) (S (VP (MD can) (VP (VB maintain) (NP (DT a) (JJ stable) (NN body) (NN temperature)) (ADVP (RB even)) (PP (IN in) (NP (NP (DT the) (NN face)) (PP (IN of) (NP (NP (JJ large) (NNS fluctuations)) (PP (IN in) (NP (DT the) (JJ environmental) (NN temperature))))))))))))))) (. .)))