20. The circulation of which of the following elemental compounds is considered to
be more bioecologically important?
A)
Carbon
B) Uranium
C)
Barium
D) Sodium
E)
Lithium
21. Biogeochemistry is defined:
A) cycle of the earth is the sum total of all processes in which water moves from the land
and ocean surface to the atmosphere and back in form of precipitation
B) the area of geology that deals with the distribution and movement of groundwater in
the soil and rocks of the earth's crust
C) how living systems (biology)
influence, and are controlled by, the geology and
chemistry of the earth
D) internally similar system of functionally related organisms and nonliving environment,
which has particular energy state, type and rate of substance and information exchange
E) the distribution of various species and ecosystems geographically and throughout
geological
time and space
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