What are the two main processes carried out by the excretory system? A. Absorbing needed nutrients and getting rid of the excess

B. Separating and eliminating wastes from the body

C. Maintaining weight and regulating temperature

D. Controlling the amount of water in the body and eliminating salt

In which of the following ways is the function of the surface of a microsphere similar to the function of an actual cell membrane? a.both make it possible for the conditions in the interior to be different from the conditions outside. b.both provide a barrier that keeps water from flowing across it so the interior remains dry. c.both separate the rna that forms in the interior from any rna that might form in the environment. d.both can actively move molecules into the interior or out into the surrounding environment.

Explain how the political influence of african americans leaders became weaker.

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.