( Individuals ( ( vary ( in ( ( the level ) ( of ( ( these ( enzyme activities ) ) ( due ( to ( both ( genetic ( and ( environmental factors ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Individuals)) (VP (VBP vary) (PP (IN in) (NP (NP (DT the) (NN level)) (PP (IN of) (NP (NP (DT these) (JJ enzyme) (NNS activities)) (ADJP (JJ due) (PP (TO to) (NP (DT both) (JJ genetic) (CC and) (JJ environmental) (NNS factors))))))))) (. .)))
Individuals vary in the level of these enzyme activities due to both genetic and environmental factors.
(ROOT (S (NP (NP (NNP Temperature)) (CC and) (NP (NN ph) (NN level))) (VP (VBP are) (ADJP (JJ important) (PP (IN in) (NP (NP (DT the) (NN activity)) (PP (IN of) (NP (DT an) (NN enzyme))))))) (. .)))