Which of the following is an example of geographic isolation?
A. A group within a population that begins to mate at a different time of year.
B. A large percentage of a population that is killed by a natural disaster.
C. A population that is divided by habitat fragmentation.
D. A group within a population that begins to mate only at night.<\/p>\n\n\n\n
The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n The correct answer is:<\/p>\n\n\n\n C. A population that is divided by habitat fragmentation.<\/strong><\/p>\n\n\n\n Explanation:<\/strong><\/p>\n\n\n\n Geographic isolation occurs when a population is physically divided into separate groups that are unable to interact or mate due to a physical barrier. This can result from factors like natural disasters, human activity, or environmental changes that alter the landscape, such as the formation of mountains, rivers, or urban developments. Habitat fragmentation is a specific type of geographic isolation where a large, continuous habitat is broken into smaller, isolated patches. This separation prevents gene flow, the exchange of genetic material, between subpopulations, causing them to evolve independently over time.<\/p>\n\n\n\n When a population is divided by geographic isolation, the separated groups may face different environmental pressures or conditions, leading to divergent evolution. In time, this can result in speciation, where the isolated populations accumulate enough genetic differences to become distinct species. The classic example of this process is seen in island species, where physical barriers (like oceans) prevent groups from interbreeding, causing them to evolve unique traits based on their specific environment.<\/p>\n\n\n\n Options A and D describe behavioral isolation<\/strong> rather than geographic isolation. These options represent differences in mating behavior, such as mating at different times or under specific conditions, which can prevent groups within a population from reproducing with each other, but not due to physical separation. Option B, where a large percentage of a population is killed by a natural disaster, does not describe any form of isolation. This situation could reduce the genetic diversity within a population but would not cause a separation into distinct groups with restricted interaction.<\/p>\n\n\n\n Thus, Option C<\/strong> is the best example of geographic isolation, as habitat fragmentation divides a population into physically separated groups, leading to reduced gene flow and potential long-term evolutionary changes.<\/p>\n","protected":false},"excerpt":{"rendered":" Which of the following is an example of geographic isolation?A. A group within a population that begins to mate at a different time of year.B. A large percentage of a population that is killed by a natural disaster.C. A population that is divided by habitat fragmentation.D. 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