( ( A program ) ( ( undertaken ( to ( ( induce acclimatization ) ( to ( ( new ( environmental conditions ) ) ( such ( as ( changes ( in ( ( temperature or ) altitude ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT A) (NN program)) (VP (VBN undertaken) (S (VP (TO to) (VP (VB induce) (NP (NN acclimatization)) (PP (TO to) (NP (NP (JJ new) (JJ environmental) (NNS conditions)) (PP (JJ such) (IN as) (NP (NP (NNS changes)) (PP (IN in) (NP (NN temperature) (CC or) (NN altitude))))))))))) (. .)))
A program undertaken to induce acclimatization to new environmental conditions such as changes in temperature or altitude.
(ROOT (S (NP (NNS Ectotherms)) (VP (VBP undergo) (S (NP (NP (DT a) (NN variety)) (PP (IN of) (NP (NP (NNS changes)) (PP (IN at) (NP (DT the) (JJ cellular) (NN level)))))) (VP (TO to) (VP (VB acclimatize) (PP (TO to) (NP (NP (NNS shifts)) (PP (IN in) (NP (NN temperature))))))))) (. .)))