19. Short answer question IV

 

The process of  osmosisexocytosisendocytosis involves the cell membrane able to bring substances from outside the cell inside. Animals don't have cell wallscytoplasmcell membrane.  As a result, in animals, as opposed to plants, the movement of substances within the cells is not possiblethe movement of substances within the cells is difficultthe movement of substances within the cells is easier. Plants have an additional layer of protection because their cell walls make the movement of substances difficult.