State the role of each of the following parts of cell chloroplast, mitochondria and nucleus

In the diagram below, the northern hemisphere would be in what season at position a a. fall b. winter c. summer d. spring

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.

Which measure of an earthquake depends on how close you are to the focus?