Toxins are found in the tissues of humans at higher concentrations than it does in the tissues of chickens. Which of the following is responsible for this?
Biomagnification
Toxin accumulation
Biosphere
Biogrowth

Which of the following is a good strategy when it comes to desserts

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

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.