Compare the shapes of the organisms that did and did not have cell walls. what effect does the cell wall have on the shape of the organism? (amoeba, paramecium, euglena and cardiac muscle did not have a cell wall, and spirogyra and onion root did) why did the animal and plant cells lack cilia, flagella, or other means of locomotion? (again organisms are amoeba, paramecium, euglena, spirogyna, onion root, and cardiac muscle) (euglena has flagella, and paramecium has cilia)