They gives us oxygen, they store carbon for us, and they provide materials for tools and shelter for us.
The Texture And Look Of A Microscopic Object
5.the colon's function is to absorb water from the undigested food and return it to the . i'm sorry i don't know the nxt answer
Simple diffusion is the concept of a substance moving from an area of high concentration to a lower concentration without energy input. Because the plasma membrane is made of lipids which are non-polar, this membrane readily allows non-polar substances to diffuse through easily. If a substance has a charge like that of an ion, it will be difficult for the ion to cross the plasma membrane through simple diffusion. The answer should be B.
