Answer:
React on cell surfaces, catalyze reactions.
Melanin conveys some UV protection
Answer:
A. Sediment
Explanation:
As water flows, it both breaks down rocks and picks up soil. When the pieces of rock and soil are travelling in water, they are called sediment.
Answer: B
Explanation: Hope it helps
Answer:
Exercising
Explanation:
This happens because, when you exercise, the blood vessels in your muscles dilate (vasodilation) and as a consequence, the rate of blood flow is faster. The increased blood flow delivers more oxygenated blood to the working muscle.