Answer:
Cell membranes are in both, the plant and animal cell. 
Explanation:
Plant cells have a cell wall and a cell membrane. In plants, the cell wall and cell membrane give the plant support and structure which giving the plant cell its unique rectangular shape. Animal cells also have a cell membrane, but doesn't have a cell wall.
 
        
             
        
        
        
appear; disappear
im not 100% sure if thats what is being asked, but they fit and are true
 
        
             
        
        
        
There are three major structures that are found in plant cells that aren't found in animal cells. These are chloroplasts, (which is where the process photosynthesis takes place), a cell wall (which keeps the structure of the cell), and a large central vacuole,  (which stores extra food/water). Don't make the mistake, though.  Animal cells have vacuoles, but they are just smaller and not as important, because they have a different way of excreting waste, which plant cells cannot do.