The earth's natural income includes
A. the human population.
B. the renewable resources provided by Earth's natural capital.
C. plants.
D. fossil fuels.
E. the nonrenewable resources.
Answer: B
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Prior to the Columbian Exchange, the only large domestic animals in the Americas used for work/protein were
A) dogs. B) dogs and llamas. C) dogs, llamas and horses. D) dogs, llamas, horses, and oxen. E) dogs, llamas, horses, oxen and pigs.
Weathered volcanic ash and lava produce excellent fertile soils.
Answer the following statement true (T) or false (F)
The dominant cooling process on Earth results from condensation
Indicate whether the statement is true or false
Of Earth's total number of species, why are the fewest in the marine pelagic realm?
a) There is more area on land for different species. b) Uniform conditions in the pelagic realm make fewer specialized environments for organism adaptation, evolution and radiation into different species. c) Organisms need a hard substrate (either land or sea bottom) in order to evolve into different species. d) Evolution of differing species is triggered by extinction, but extinction is rare in the pelagic environment. e) The pelagic realm contains the photic zone, and solar radiation in the photic zone suppresses the number of new species that evolve.