( ( ( ( Cell ( Membrane ( Cell membranes ) ) ) or ) ( Plasma membranes ) ) ( ( are ( present ( on ( all cells ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Cell) (NNP Membrane) (NNP Cell) (NNS membranes)) (CC or) (NP (NNP Plasma) (NNS membranes))) (VP (VBP are) (ADJP (JJ present) (PP (IN on) (NP (DT all) (NNS cells))))) (. .)))
Cell Membrane Cell membranes or Plasma membranes are present on all cells.
(ROOT (S (NP (NP (DT All) (NNS types)) (PP (IN of) (NP (NNS cells)))) (VP (VBP are) (VP (VBN enclosed) (PP (IN by) (NP (DT a) (NN membrane))))) (. .)))
All types of cells are enclosed by a membrane.