The answer to this is E. none of the above. All of the parts that are mentioned above can all be found in plant cells. They also have different functions. The mitochondria are known to work similarly to a digestive system. The cell membrane serves as the protection of the cell from the environment.
The ribosome is the place wherein the RNA is changed into protein. The endoplasmic reticulum will make sure that proteins are all arranged properly within the cell. All of these cell parts are available in cells because they all work together to ensure that the cell will continue to thrive, live, and even multiply.