Changes that occur at the genetic level in populations are classified as ________

A) gradualism B) microevolution C) macroevolution D) chemical evolution


Answer: B

Biology & Microbiology

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About __________ million individuals, the majority

of them under age twenty-five, become infected with an STD in the United States annually. a. 1 b. 3 c. 5 d. 10 e. 15

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The scientific theories for the origin of life suggest that life arose 

A. by endosymbiosis. B. as a result of God's creation. C. by deliberate design. D. from natural processes and that these processes can be observed and evaluated by scientific experimentation.

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What is the relationship between recombination frequency and the actual physical distance on a chromosome?

A. As physical distance increases, the recombination frequency increases in a linear fashion. B. As physical distance increases, the recombination frequency first increases in a linear fashion, but gradually levels off to a frequency of 0.5. C. As physical distance increases, the recombination frequency decreases in a linear fashion. D. As physical distance increases, the recombination frequency first increases, but then decreases.

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For human races to be considered valid biological groupings, the genetic diversity within the group would have to be ________ the genetic diversity between groups.

A. higher than B. equal to C. lower than

Biology & Microbiology