Which of the following is an example of positive feedback?
-abscisic acid (aba) in plants slows bud growth in cold temperatures.
-an increase in ethylene gas causes fruits to ripen more quickly.
-taking a tranquilizer slows the speed of signal transmission in neurons.
-panting in dogs increases the amount of cool air in nasal passages and lowers body temperature

The diagram illustrates the activity of vesicles during a cellular process.

Which of the following structures is not found in both plant and animal cells? a) chloroplast b) cytoskeleton c) ribosomes d) mitochondria

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