Because the surface of a leaf is smooth if the surface was rough the water would get stuck but it is smooth so the water just rolls off
The most observabledifference<span> is the way in which cytokinesis occurs. In </span>plants<span> a new cell wall is fashioned </span>between<span> the new daughter cells, while in </span>animal<span> cells the cell membrane constricts to pinch the parent cell into daughter cells.</span>
Imprinting is the answer.