Scientists are investigating how different ecosystems store carbon as biomass, which could reduce or delay the impacts of climate change. They estimate that the net primary productivity (NPP) of tundra (an arctic/alpine biome) is about 2.5 g C /m2/yr, and that this carbon has a residence time of 146 years. What is the size of the pool of carbon stored as biomass

Acell in the human nervous system whose primary function is to form myelin and the blood-brain barrier, respond to injury, remove debris, and enhance learning and memory is called a(n) cell.

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.

Identify the structures ! 20 points