Multiple Choice
Which of the following statements about dispersal is correct?
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48. Ecology
Biogeography
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Which of the following is the best definition of biogeographic isolation?
A
The extinction of species as a result of competition with invasive species.
B
The migration of species from one continent to another due to climate change.
C
The adaptation of organisms to different environmental conditions within the same geographic area.
D
The separation of populations of organisms by physical barriers such as mountains or oceans, leading to limited gene flow between them.
Verified step by step guidance1
Step 1: Begin by understanding the term 'biogeographic isolation.' It refers to the separation of populations of organisms by physical barriers, such as mountains, oceans, or other geographic features, which restrict gene flow between populations.
Step 2: Analyze the options provided in the question. Eliminate choices that do not align with the concept of physical barriers or limited gene flow. For example, extinction due to competition or migration due to climate change are unrelated to physical barriers.
Step 3: Focus on the correct definition. Biogeographic isolation specifically involves physical separation, which prevents populations from interbreeding and can lead to genetic divergence over time.
Step 4: Compare the correct definition to the remaining options. Ensure that the chosen answer explicitly mentions physical barriers and limited gene flow, as these are key components of biogeographic isolation.
Step 5: Confirm that the correct answer is: 'The separation of populations of organisms by physical barriers such as mountains or oceans, leading to limited gene flow between them.' This matches the definition of biogeographic isolation.
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