Describe the role of (A) bacteria fixing nitrogen as they live symbiotically with some plant species, (B) nitrifying bacteria, and (C) denitrifying bacteria in the nitrogen cycle.

Aflashlight battery is an example of a) potential energy b) kinetic energy c) thermal energy d) solar energy

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.

Why are some places regularly warmer or cooler than others in a given month