Multiple Choice
Which of the following types of prezygotic isolating mechanisms is described correctly?
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23. Speciation
Introduction to Speciation
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Which statement does not describe geographic isolation?
A
Populations are separated by different mating seasons.
B
A mountain range divides two populations of the same species.
C
An island population is isolated from the mainland population.
D
A physical barrier separates populations, preventing interbreeding.
Verified step by step guidance1
Understand the concept of geographic isolation: Geographic isolation occurs when physical barriers prevent populations of the same species from interbreeding, leading to reproductive isolation and potentially speciation over time.
Identify the key characteristics of geographic isolation: It typically involves physical barriers such as mountains, rivers, or oceans that separate populations.
Analyze each statement provided in the problem: Determine whether each statement describes a scenario where a physical barrier is involved in separating populations.
Evaluate the statement 'Populations are separated by different mating seasons': Recognize that this describes temporal isolation, not geographic isolation, as it involves differences in timing rather than physical barriers.
Conclude that the statement about different mating seasons does not describe geographic isolation, as it lacks a physical barrier separating the populations.
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