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Acid rain is the direct result of acid released by burning fossil fuels. select the best answer from the choices provided ot o f true or false

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

Drag each tile to the correct box. the body monitors the levels of oxygen in the blood to regulate breathing. isabel is running in a marathon and is near the finish line. she feels out of breath. how will her nervous system work to generate a reaction? arrange the tiles in chronological order. isabel's breathing rate increases. sensory receptors in the arteries detect low oxygen levels. the brain sends signals through motor neurons. sensory neurons generate an impulse. the central nervous system relays an impulse to certain brain regions.