Question

a new factory has been constructed near a large, still lake that is home to many species of fish and other wildlife. although environmental regulations prohibit the dumping of toxic chemicals from the factory into the lake, these prohibitions are poorly enforced and chemicals are continuously dumped into the lake. once the chemicals are in the lake, they diffuse through the water. which group of fish will most likely be affected by the toxic chemicals first? fish at location a. fish at location b. all the fish in the lake will be affected at the same time. after the factory has been open for a few months and has been continuously dumping toxic chemicals into the lake, you measure the concentration of these chemicals at various locations within the lake. how will the concentrations of toxic chemicals in the lake differ at locations a and b? high at b, lower at a same at a and b high at a, lower at b. high at a, zero at b.

Explanation:

For the first question, since the factory is near location A and chemicals diffuse from the source (factory - location A area), fish at location A will be affected first. For the second question, after continuous dumping and diffusion (in a still lake, over months), the chemical concentration will become uniform throughout the lake (assuming no other factors like sedimentation etc. which are not mentioned), so concentrations at A and B will be the same.

Answer:

First question: Fish at location A.
Second question: Same at A and B.