( ( Sexual reproduction ) ( ( produces diversity ) . ) )
(ROOT (S (NP (JJ Sexual) (NN reproduction)) (VP (VBZ produces) (NP (NN diversity))) (. .)))
Sexual reproduction produces diversity.
(ROOT (S (NP (NNS Spores)) (VP (VBP are) (ADVP (RB generally)) (VP (VBN produced) (PP (IN through) (NP (JJ sexual) (NN reproduction))))) (. .)))