Organisms, such as algae and bacteria, that drift with ocean currents are known as ________
A) plankton
B) benthos organisms
C) nekton
D) biomass
E) none of these
A
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Which of the following best matches the description?Author of Walden, which describes a year in which he lived in direct contact with nature.
A. Henry David Thoreau B. Rachel Carson C. environmental justice D. John Muir E. deep ecology F. industrial ecology G. development ethic H. preservation ethic I. morals J. ethics K. Ralph Waldo Emerson L. conservation ethic M. Aldo Leopold
The polar front theory of a developing wave cyclone was conceived in?
a. ?Norway. b. ?Great Britain. c. ?the United States. d. ?Germany. e. ?the Soviet Union.
Which of the following is not true of dry climates?
A) Dry climates are generally located in bands immediately to the north and south of the low-latitude humid climates. B) Many dry regions are associated with the subtropical high pressure zone. C) Some deserts are caused mainly by mountain ranges that isolate land from ocean sources of moisture. D) Arid climates have severe moisture shortages year round, while most semiarid climates have a rainy season in which sufficient moisture is available for abundant, if brief, vegetation growth. E) Both arid and semiarid regions lack sufficient moisture and heat to make any plants grow for more than a month each year.
If you wanted to study the various shapes of different kinds of bacteria, you could use
A. a light microscope or an electron microscope. B. an electron microscope, but not a light microscope. C. the unaided eye. D. a light microscope or the unaided eye.