Compare the shapes of the organisms that have cell walls with those that do not have cell walls. what effect does the cell wall have on the shape of an organism? a. it restricts the cell shape: the spirogyra and onion cells are fairly uniform rectangles. all the other organism have more variable cell shapes, especially the amoeba. b. it increases the variability of cell shape: the spirogyra and onion cells have a wide variety of cell shapes. all the other organisms are fairly uniform circles. c. it has no effect; all cell shapes are similar to one another. will mark brainliest! asap !