What is an area where a river meets the sea and includes some of the earth's most productive wetlands?
A. euphotic zone
B. estuary
C. inlets
D. bays
E. coastal marshes
Answer: B
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In a battery, the following two oxidation-reduction reactions are taking place: rxn A: Zn ? Zn+2 + 2e- rxn B: 2 NH4+ + 2e- ? 2 NH3 + H2Which reaction is taking place at the anode?
A. Both reactions are happening at both the anode and cathode. B. The reaction takes place at the electrode, not the anode. C. Both reactions are happening at the electrode. D. rxn B E. rxn A
Triassic sedimentation in western North America consisted of
a. marine and nonmarine sedimentation. d. evaporites. b. only marine sedimentation. e. limestone and shale. c. only nonmarine sedimentation
All dunes originate in desert conditions
Indicate whether the statement is true or false
Transfers of migrant workers' wages to their families back home is called ________
Fill in the blank(s) with correct word