The statement that genetics can influence the amount of body fat an individual possesses is true. The genetics determines a specific weight range that your body may prefer and determine for example if women will carry this body fat around the hips and thighs as opposed to storing fat in the upper body.
However, exercise beats genetics in determining amount of body fat.
The pressure exerted by the sharp knife edge is more than that exerted by the blunt one because the area on which force is exerted with a sharp knife is very small.So blunt knife cannot cut the vegetables properly.
