The eastern grey squirrel lives mostly in oak trees that have a medium gray bark. in some cities, oak tree bark is darkening due to air pollution. this eastern grey squirrel shows melanism, or the increase in black pigment in its fur. what is most likely the reason for the change in fur color?

Where can you find prokaryotic and eukaryotic cells?

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.

Vinegar has a ph of 3, and household ammonia has a ph of 11. is the concentration of h+ greatest in the vinegar or ammonia?