What was rudolph virchow’s contribution to the cell theory? he concluded that all cells come from preexisting cells. he concluded that cells are the basic units of structure and function of all living things. he concluded that all organisms are composed of cells. he concluded that all cells are similar in composition and metabolic activities.

For the strategies below, decide whether they are best described as demand-side solutions or supply-side solutions to meeting human needs for fresh water. remember that a demand-side solution reduces demand for fresh water, whereas a supply-side solution increases the supply of fresh water. (a) damming a river to create a reservoir (b) desalinating seawater (c) a nation invading a neighboring country to access their rivers (d) raising water prices for consumers and businesses (e) providing tax breaks for companies that use less water (f) replacing inefficient irrigation with more-efficient drip irrigation to grow crops (g) requiring low-flow showerheads in all new homes