( ( ( ( In ( single-celled organisms ) ) ( , ( ( waste products ) ( are ( ( discharged ( directly ( through ( ( the surface ) ( of ( the cell ) ) ) ) ) ) . ) ) ) ) ) ( ( Multicellular organisms ) ( use ( ( ( more ( ( complex methods ) . ) ) ( Higher plants ) ) ( ( ( eliminate gases ) ( through ( ( the stomata ) ( on ( ( the surface ) ( of leaves ) ) ) ) ) ) . ) ) ) ) ) ( Animals ( ( have ( special ( excretory organs ) ) ) . ) ) )
(ROOT (S (S (S (PP (IN In) (NP (JJ single-celled) (NNS organisms))) (, ,) (NP (NN waste) (NNS products)) (VP (VBP are) (VP (VBN discharged) (PP (ADVP (RB directly)) (IN through) (NP (NP (DT the) (NN surface)) (PP (IN of) (NP (DT the) (NN cell))))) (. .)))) (NP (NNP Multicellular) (NNS organisms)) (VP (VBP use) (FRAG (X (X (ADVP (RBR more)) (NP (JJ complex) (NNS methods)) (. .)) (NP (JJR Higher) (NNS plants))) (VP (VBP eliminate) (NP (NNS gases)) (PP (IN through) (NP (NP (DT the) (NN stomata)) (PP (IN on) (NP (NP (DT the) (NN surface)) (PP (IN of) (NP (NNS leaves)))))))) (. .)))) (NP (NNS Animals)) (VP (VBP have) (NP (JJ special) (NN excretory) (NNS organs))) (. .)))
In single-celled organisms , waste products are discharged directly through the surface of the cell. Multicellular organisms use more complex methods. Higher plants eliminate gases through the stomata on the surface of leaves. Animals have special excretory organs.
(ROOT (S (S (NP (JJ Single-celled) (NNS organisms) (CC and) (NN multicellular) (NNS organisms)) (VP (VBP have) (NP (NP (DT this)) (PP (IN in) (NP (JJ common)))))) (: :) (S (NP (DT both)) (VP (VBP have) (NP (DT a) (NN way) (S (VP (TO to) (VP (VB get) (ADJP (JJ rid)) (PP (IN of) (NP (NN waste) (NNS materials))))))))) (. .)))