( ( Compared ( with ( innate behaviors ) ) ) ( , ( ( learned behaviors ) ( ( are ( more flexible ) ) . ) ) ) )
(ROOT (S (PP (VBN Compared) (PP (IN with) (NP (JJ innate) (NNS behaviors)))) (, ,) (NP (JJ learned) (NNS behaviors)) (VP (VBP are) (ADJP (RBR more) (JJ flexible))) (. .)))
Compared with innate behaviors,  learned behaviors are more flexible.
(ROOT (S (NP (NNP Reflex) (NNS behaviors)) (VP (VBP are) (NP (NP (DT the) (RB only) (JJ innate) (NNS behaviors)) (PP (IN in) (NP (NNS humans))))) (. .)))