( Inaddition ( , ( prokaryotes ( ( lack ( membrane-bound organelles ) ) . ) ) ) )
(ROOT (S (S (VP (VBN Inaddition))) (, ,) (NP (NNS prokaryotes)) (VP (VBP lack) (NP (JJ membrane-bound) (NNS organelles))) (. .)))
Inaddition, prokaryotes lack membrane-bound organelles.
(ROOT (S (NP (NNS Prokaryotes)) (VP (VBP are) (NP (NN unicellular) (NNS organisms)) (SBAR (IN that) (S (NP (NN lack) (NNS organelles)) (VP (VBN surrounded) (PP (IN by) (NP (NNS membranes))))))) (. .)))
Prokaryotes are unicellular organisms that lack organelles surrounded by membranes.