( ( These weeds ) ( ( have ( a ( characteristic ( strong odor ) ) ) ) . ) )
(ROOT (S (NP (DT These) (NNS weeds)) (VP (VBP have) (NP (DT a) (JJ characteristic) (JJ strong) (NN odor))) (. .)))
These weeds have a characteristic strong odor .
(ROOT (S (NP (JJ Strong) (NN odor)) (VP (VBZ helps) (S (NP (DT some) (NNS animals)) (VP (VB defend) (NP (PRP themselves)) (PP (IN against) (NP (NNS predators)))))) (. .)))
Strong odor helps some animals defend themselves against predators.