Multiple Choice
In the context of organic chemistry, the land plants are probably descendants of which of these groups?
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Intro to Organic Chemistry
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Which of the following situations leads to microevolution in a population?
A
Stable environment with no changes
B
Uniform selection pressure across all individuals
C
Genetic drift
D
Complete isolation from other populations
Verified step by step guidance1
Understand the concept of microevolution: Microevolution refers to small-scale changes in allele frequencies within a population over time. These changes can be due to several factors, including natural selection, genetic drift, mutation, and gene flow.
Analyze the given situations: A stable environment with no changes and uniform selection pressure across all individuals are unlikely to lead to microevolution because they do not introduce variability or change in allele frequencies.
Consider genetic drift: Genetic drift is a mechanism of microevolution that involves random changes in allele frequencies, especially in small populations. It can lead to significant changes over time, even in the absence of selection pressures.
Evaluate the impact of complete isolation: Complete isolation from other populations can lead to microevolution if genetic drift occurs, as there is no gene flow to counteract the random changes in allele frequencies.
Conclude that genetic drift is the correct answer: Among the given options, genetic drift is the situation that leads to microevolution by causing random changes in allele frequencies within a population.
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