( ( ( ( ( They ( reproduce sexually ) ) , ) and ) ( they ( reproduce asexually ) ) ) . )
(ROOT (S (S (NP (PRP They)) (VP (VB reproduce) (ADVP (RB sexually)))) (, ,) (CC and) (S (NP (PRP they)) (VP (VB reproduce) (ADVP (RB asexually)))) (. .)))
They reproduce sexually, and they reproduce asexually.
(ROOT (S (NP (DT All)) (VP (VBZ vertebrates) (VP (VB reproduce) (ADVP (RB sexually)))) (. .)))