Suppose a small river with a population of 10,000 frogs becomes polluted with cadmium to a level of 3 mg per gallon per day. About how many bullfrogs would be expected to die?

3000 bullfrogs

Explanation:

Check the graph attached below for more details on the bullfrogs that will die if 3 mg per gallon per day of cadmium was added to the small river having population of 10000 frogs.

explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.

currents is the correct answer.