Which of the following is an example of qualitative observation? a. joseph is observing the color difference in the reaction mixture of each of the test samples to see what types of proteins are present in them.
b. joseph is measuring the color of the reaction mixture colorimetrically to see the concentration of proteins in the sample.
c. joseph is observing the color of the reaction mixture to see whether proteins are present in the given solution.

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