( ( The sun ) ( ( is ( ( the ( ultimate source ) ) ( of ( energy ( in ( ( most ( ( terrestrial and ) marine ) ) ecosystems ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN sun)) (VP (VBZ is) (NP (NP (DT the) (JJ ultimate) (NN source)) (PP (IN of) (NP (NP (NN energy)) (PP (IN in) (NP (ADJP (RBS most) (JJ terrestrial) (CC and) (JJ marine)) (NNS ecosystems))))))) (. .)))
The sun is the ultimate source of energy in most terrestrial and marine ecosystems.
(ROOT (S (ADVP (RB Ultimately)) (, ,) (NP (JJS most) (NN life) (NNS forms)) (VP (VBP get) (NP (PRP$ their) (NN energy)) (PP (IN from) (NP (DT the) (NN sun)))) (. .)))