Which or the following proccesses requires the expenture of cellular engery? a)diffusion
b)osmosis
c)endocytosis
d)faciliated diffusion
e)c and d

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.

What is the function of the nucleus in the euglena cells you observed?

What is an example of a scientific question that galileo could not have answered with out this new tool?