Which of the following is NOT one of the major changes occurring globally in agriculture?
A) increase in the use of chemicals
B) increase in the use of machinery
C) increased integration into wider economic and industrial systems
D) increase in the number of people employed in agriculture
E) both increase in the use of chemicals and machinery
Answer: D
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The largest reservoir or store of phosphorus can be found in
A) atmosphere. B) biota. C) soils. D) oceans.
Both fluvial and eolian processes:
a. deposit alluvium. b. have suspended load. c. move sediments in traction. d. have dissolved load. e. pick up sediment by deflation.
Winds off the Atlantic and Pacific coasts and the shores of the Great Lakes could generate enough electricity to replace all the United States' ____.
A. solar energy B. hydroelectric power C. coal-burning power plants D. nuclear power plants E. geothermal plants
New genetic traits upon which natural selection can act usually arise from
A) mutations and crossover. B) increases in cell size and shape. C) the desire to become adapted to a new environment. D) the wish to make evolutionary progress.