( It ( ( is ( ( ( positive ( for ( growth reactions ) ) ) and ) ( negative ( for ( decay reactions ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (ADJP (ADJP (JJ positive) (PP (IN for) (NP (NN growth) (NNS reactions)))) (CC and) (ADJP (JJ negative) (PP (IN for) (NP (NN decay) (NNS reactions)))))) (. .)))
It is positive for growth reactions and negative for decay reactions.
(ROOT (S (S (VP (VBZ Is) (NP (NP (DT the) (NN heat)) (PP (IN of) (NP (NP (NN reaction)) (PP (IN for) (NP (DT an) (JJ endothermic) (NN reaction)))))))) (VP (VBZ is) (ADJP (JJ positive))) (. .)))