( Daphnia ( ( have ( open ( circulatory systems ) ) ) . ) )
(ROOT (S (NP (NNP Daphnia)) (VP (VBP have) (NP (JJ open) (NN circulatory) (NNS systems))) (. .)))
Daphnia have open circulatory systems.
(ROOT (S (NP (DT A) (NN jellyfish)) (VP (VBZ does) (RB not) (VP (VB have) (NP (DT a) (JJ circulatory) (NN system)))) (. .)))