Question

unlike the cell membrane, the cell wall is
found in all organisms.
composed of a lipid bilayer.
selectively permeable.
a rigid structure.

Explanation:

• Cell walls are not present in all organisms (e.g., animal cells lack them).
• The cell membrane, not the cell wall, is made of a lipid bilayer.
• Both cell membranes and some cell walls can be selectively permeable, so this is not a distinguishing feature.
• Cell walls provide structural support and are rigid, while cell membranes are flexible.

Answer:

D. a rigid structure.