( ( These ( single-celled ( floating plants ) ) ) ( ( ( use ( ( ( ( ( ( the ( sun 's ) ) energy ) , ) water ) and ) ( ( the ( carbon dioxide ) ) ( from ( the water ) ) ) ) ) ( through ( photosynthesis ( to ( form ( ( glucose and ) oxygen ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT These) (JJ single-celled) (VBG floating) (NNS plants)) (VP (VBP use) (NP (NP (NP (DT the) (NN sun) (POS 's)) (NN energy)) (, ,) (NP (NN water)) (CC and) (NP (NP (DT the) (NN carbon) (NN dioxide)) (PP (IN from) (NP (DT the) (NN water))))) (PP (IN through) (NP (NN photosynthesis) (S (VP (TO to) (VP (VB form) (NP (NN glucose) (CC and) (NN oxygen)))))))) (. .)))
These                    single-celled floating plants use the sun's energy, water and                    the carbon dioxide from the water through photosynthesis to                    form glucose and oxygen.
(ROOT (S (PP (IN During) (NP (NN photosynthesis))) (, ,) (NP (NP (NN energy)) (PP (IN from) (NP (DT the) (NN sun)))) (VP (VBZ is) (VP (VBN converted) (PP (TO to) (NP (NN glucose))) (PP (IN after) (S (VP (VBG entering) (NP (DT a) (NN plant))))))) (. .)))