What Organisms Have Cell Walls. Animal cells do not have cell walls, nor do protozoa. In fungi , the cell wall contains a polysaccharide called chitin.
Gram positive and negative bacteria that lost their cell wall or peptidoglycan.
All cells have cell membranes, but generally only plants, fungi, algae, most bacteria, and archaea have cells with cell walls. The cell (from latin cella, meaning small room) is the basic structural, functional, and biological unit of all known organisms. The most critical role of cilia and flagella is movement. Can anyone explain how traits can go on existing in organisms/populations despite not offering any apparent reproductive value or advantage?