cell theory, animal and plant cells
animal cell- does have a cell wall so it does not move around the animal.
plant cell- the plant has not have a cell wall so it does move around
the plant cell has no cell wall so it stays moving all the time. But the the plant cell has no chloroplast, but the animal cell does. The plant cell does not have the cytoplasm but the animal cell has the cytoplasm.
the cell theory has it's ways of scientist having different theories of the cell theory. This one scientist Robert Hooke made his theory that cells come from other existing cells. But other scientists had another theory that cells come from other pre cell existing cells. So that the cells just pop up when ever they want.