Which of the following likely triggered the Holocene extinction?
a. European colonial expansion in the 1600s
b. The rising popularity of zoos in the late 1800s
c. A large asteroid hitting Earth more than 250 million years ago
d. An unprecedented increase of photosynthetic organisms 2.45 billion years ago
a. European colonial expansion in the 1600s
The Holocene extinction was likely triggered by European colonial expansion beginning in the 1600s. Several resulting events include the overhunting of the dodo and passenger pigeon and the increased use of carbon-based fuels such as coal, diesel, and gasoline.
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The size of the amplified DNA fragment generated during PCR is determined by
A. how many cycles are performed. B. the size of the template DNA. C. the location to which the primers anneal. D. how much Taq is used.
The thinking process of proposing a general explanation from individual observations is called:
a. scientific method. b. deductive reasoning. c. logical reasoning. d. inductive reasoning. e. logical-positivist reasoning.
What does the figure suggest about patterns of biodiversity for particular groups of organisms?
A) Species diversity is highest at the equator. B) Species diversity is highest at the poles. C) Climatic influences are most important in determining areas of higher diversity. D) Diversity patterns are unpredictable.
Approximately how many base pairs are still improperly matched in the bacterial genome after the DNA polymerase proofreads the DNA strand?
A. 1 in a billion B. 1 in 1,000,000 C. 1 in 10,000 D. 1 in 100,000,000 E. 1 in 100,000