Which of the following does not occupy the bottom of an energy pyramid?a.phytoplanktonb.treesc.grassd.zooplankton
After the energy crisis of the 1970’s and the OPEC oil embargo, the US _______.a.increased its dependency on foreign oilb.began to wean itself off of foreign oil and the economic vulnerability it bringsc.changed over to all renewable energy sourcesd.began building new nuclear power plants to replace fossil fuel use
Agricultural practices can lead to water pollution.
Why has the spread of the herbicide-resistant hydrilla through Florida’s waterways resulted in them no longer being navigable by most boats?a.Thy hydrilla has induced a drought that drained the waterways.b.The weed clogs propellers that boats use for propulsion.c.The sticky leaves of the weed hold boats in place.d.All of the above
Soil formation is dependent on a number of factors.
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