Answer:
1. Providing structure --> Collagen makes skin strong yet flexible.
2. Maintaining homeostasis --> Insulin controls the concentration of sugar in the blood.
3. Fighting Disease --> IgA prevents the buildup of viruses and bacteria in the gut.
4. regulating chemical reactions --> Pepsin works in the stomach to speed up the breakdown of food.
<span>The Answer is D. Maintaining Structure</span>
Answer:
Big leaves cause water loss
Cellular respiration. aerobic glycolysis is the synthesis of glucose to ATP in humans
