2) some cells have several nuclei per cell. how could such multinucleated cells be explained? a) the cell underwent repeated mitosis, but cytokinesis did not occur. b) the cell underwent repeated mitosis with simultaneous cytokinesis. c) the cell underwent repeated cytokinesis but no mitosis. d) the cell had multiple s phases before it entered mitosis.

The correct answer is a) The cell underwent repeated mitosis, but cytokinesis did not occur.

Explanation:

Multinucleated cells go through mitosis and form many nuclei but as there's no cytokinesis involved, therefore, the cell never actually separates. This type of cells, that are formed with a process of the mitosis without cytokinesis is called coenocyte.  

answer; both surfaces of the membrane are nonpermeable