1. Which type of transport below moves water through a selectively-permeable membrane from areas of greater concentration to areas of lesser concentration?
   

ADiffusion

BFacilitated

COsmosis

DChain-Reactive

1. Diffusion occurs to ultimately reach _______ or an even distribution of molecules throughout a given space (remember the yellow dye in water?)
   

AEquilibrium

BInstability

CHigh concentration

DLow concentration

1. Water movement into and out of a cell is dependent upon the ___________ surrounding the cell.
   

ATemperature

BEnvironment

CNumber of lipid molecules

DTotal number of phospholipid molecules in the cell membrane

1. Which comparison of osmosis and diffusion is accurate?
   

AOsmosis moves molecules, diffusion moves water

BDiffusion moves across a selectively-permeable membrane, osmosis does not involve a membrane

CBoth move molecules up a concentration gradient

DOsmosis moves water down a concentration gradient, diffusion moves molecules down a concentration gradient