Which is an example of cell differentiation and specialization? A. All mammal cells are identical.

B. Starting as stem cells, a

gene cuts on in each which leads to them changing into muscle cells, fat cells, nerve cells, and red blood

cells each having different jobs.

C. All cells have cilia at the adult stage.

D. The DNA is different in all body cells.

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