객관식
Which of the following statements about secondary succession is correct?
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1. Introduction to Biology
Natural Selection and Evolution
객관식
Which of the following best distinguishes vicariance from dispersal in the context of natural selection and evolution?
A
Both vicariance and dispersal describe the extinction of populations due to environmental changes.
B
Vicariance and dispersal are both terms for genetic drift in small populations.
C
Vicariance involves the physical splitting of a population by a geographic barrier, while dispersal involves individuals moving to a new area and forming a new population.
D
Vicariance refers to the movement of individuals across existing barriers, while dispersal is the splitting of a population by a new barrier.
검증된 단계별 안내1
Understand the key terms: Vicariance and dispersal are both mechanisms that can lead to speciation, but they differ in how populations become geographically isolated.
Clarify vicariance: Vicariance occurs when a population is physically split into two or more groups by a geographic barrier, such as a mountain range, river, or tectonic activity. This separation prevents gene flow between the groups.
Clarify dispersal: Dispersal happens when individuals from a population move to a new area, crossing existing barriers, and establish a new population. This movement can lead to geographic isolation over time.
Compare the two processes: The main distinction is that vicariance involves the creation of a barrier that divides a population, while dispersal involves individuals actively moving to a new location.
Apply the definitions to the options: Based on the definitions, the correct answer is the one that states 'Vicariance involves the physical splitting of a population by a geographic barrier, while dispersal involves individuals moving to a new area and forming a new population.'
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