Bioremediation has been particularly effective in marine ecosystems in the clean-up of ________
A) heavy metals
B) hydrocarbons
C) nitrates
D) pesticides
E) thermal effluents
B
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The zone of a glacier in which additions of ice exceed losses is called ____
a. the zone of ablation b. the zone of accumulation c. the zone of wastage d. the snowline e. isostatic rebound
If, in an inverse estuary, the inflow of seawater of 35-percent salinity is 21 units per year and the outflow is 18 units per year, the salinity of outflowing water is ________.
A. 35 percent B. 41 percent C. 30 percent D. 38 percent E. 65 percent
Which of the following is a way in which water weakens earth materials?
A. absorption/adsorption B. weight of water C. ability to dissolve cement D. all of the choices are correct
The asthenosphere is a mantle zone of low seismic wave velocity that behaves in a ductile manner.
a. true b. false