Carbohydrates are like identification badges. Cells that have different membrane carbohydrates do different . The immune system uses the carbohydrates to that your cells belong to and are not , , or other foreign cells..

What energy conversion occurs when a sling shot is used to shoot a rock across the room? (2 points) question 2 options: 1) stored mechanical energy is converted to mechanical energy. 2) stored mechanical energy is converted to radiant energy. 3) gravitational energy is converted to radiant energy. 4) gravitational energy is converted to mechanical energy.