( ( Most reptiles ) ( ( ( ( reproduce sexually ) , ) ( though ( some ( are ( capable ( of ( asexual reproduction ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJS Most) (NNS reptiles)) (VP (VB reproduce) (ADVP (RB sexually)) (, ,) (SBAR (IN though) (S (NP (DT some)) (VP (VBP are) (ADJP (JJ capable) (PP (IN of) (NP (JJ asexual) (NN reproduction)))))))) (. .)))
Most reptiles reproduce sexually, though some are capable of asexual reproduction.
(ROOT (S (NP (JJS Most) (NNS reptiles)) (VP (VB reproduce) (ADVP (RB sexually))) (. .)))