( ( The hornworts ) ( ( ( are ( unique ( among ( nonvascular plants ) ) ) ) ( because ( ( their sporophyte ) ( continues ( to ( grow ( for ( ( the life ) ( of ( the gametophyte ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNS hornworts)) (VP (VBP are) (ADJP (JJ unique) (PP (IN among) (NP (NN nonvascular) (NNS plants)))) (SBAR (IN because) (S (NP (PRP$ their) (NN sporophyte)) (VP (VBZ continues) (S (VP (TO to) (VP (VB grow) (PP (IN for) (NP (NP (DT the) (NN life)) (PP (IN of) (NP (DT the) (NN gametophyte)))))))))))) (. .)))
The hornworts are unique among nonvascular plants because their sporophyte continues to grow for the life of the gametophyte.
(ROOT (S (NP (NNP Nonvascular) (NNS plants)) (VP (VBP are) (NP (NP (DT the) (JJ only) (NNS plants)) (PP (IN with) (NP (DT a) (NN life) (NN cycle))) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (DT the) (JJ gametophyte) (NN generation)) (VP (VBZ is) (ADJP (JJ dominant))))))) (. .)))