Two major approaches to non-fossil-fuel energy alternatives are renewable energy and
A) nuclear power.
B) geothermal.
C) wind energy.
D) solar energy.
Question 2
The fact that every organism in a biological community has a distinctly separate niche is largely the result of
A) abiotic factors: soil chemistry, temperature, and moisture.
B) competition among many species for limited resources.
C) seasonal climate changes.
D) the fact that nearly all species live at the limits of their tolerance boundaries.
Basic energy of a human life
Solar Energy Input Varies with Latitude
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