( Yeast ( ( ( ( ( is single-celled ) , ) and ) ( reproduces ( ( ( either sexually ) or ) asexually ) ) ) . ) )
(ROOT (S (NP (NN Yeast)) (VP (VP (VBZ is) (ADJP (JJ single-celled))) (, ,) (CC and) (VP (VBZ reproduces) (NP (NP (RB either) (RB sexually)) (CC or) (NP (NN asexually))))) (. .)))
Yeast is single-celled, and reproduces either sexually or asexually.
(ROOT (S (NP (NNP Single-celled)) (VP (VBP are) (ADJP (JJ yeasts))) (. .)))