Each species of yucca plant is pollinated exclusively by one species of yucca moth. This insect cannot complete its life cycle in any other plant, as its larvae can only grow in the yucca flower. Which of these terms BEST describes the relationship between the moth and the plant?

a. predation

b. mutualism

c. competition

d. commensalism

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