( Plankton ( ( is ( ( made up ) ( of phytoplankton ) ) ) . ) )
(ROOT (S (NP (NNP Plankton)) (VP (VBZ is) (VP (VBN made) (PRT (RP up)) (PP (IN of) (NP (NN phytoplankton))))) (. .)))
Plankton is made up of phytoplankton.
(ROOT (S (NP (NNP Phytoplankton)) (VP (VBP make) (NP (NP (NN food)) (PP (IN via) (NP (NN photosynthesis))))) (. .)))