( ( That type ) ( ( is ( sexual reproduction ) ) . ) )
(ROOT (S (NP (DT That) (NN type)) (VP (VBZ is) (NP (JJ sexual) (NN reproduction))) (. .)))
That type is sexual reproduction.
(ROOT (S (NP (JJ Sexual) (NN reproduction)) (ADVP (RB usually)) (VP (VBP occur) (PP (IN during) (NP (NP (NNS times)) (PP (IN of) (NP (JJ environmental) (NN stress)))))) (. .)))