Multiple Choice
Mutualistic relationships between bacteria and certain root nodules play an important role in the global cycling of _______________
A) nitrogen
B) phosphorus
C) carbon
D) rock
E) water
Correct Answer:

Verified
Correct Answer:
Verified
Q1: Identify the anthropogenic sources of phosphorus,and explain
Q3: Matter contained in living organisms<br>A)hydrosphere<br>B)ecosystem<br>C)transpiration<br>D)water table<br>E)evaporation<br>F)biosphere<br>G)atmosphere<br>H)condensation<br>I)lithosphere<br>J)aquifer<br>K)biomass<br>L)precipitation
Q4: By damming rivers, we are _<br>A)increasing transpiration
Q5: Read the following scenario and answer the
Q8: The eutrophication that has taken place in
Q9: Upper limit of groundwater in soil or
Q10: Ecotones are the _<br>A)transitional zones between ecosystems<br>B)sounds
Q11: Read the following scenario and answer the
Q13: How and why do ecologists use GIS
Q20: Human activity has affected every aspect of