What is the significance of the discovery of exoplanets?
A. They may possibly be inhabited or harbor life.
B. They can provide natural resources for the future.
C. They help our understanding of the formation of planetary bodies.
D. They help calibrate GPS satellites.
E. They help understand the nature of the expansion of the universe.

Which organelle breaks down sugar molecules that supply energy to the 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.

Urban areas use energy than rural areas, mostly because so many more people live there. a) solar power b) more; in total c) less; in total d) an electric furnace