Multiple Choice
Which type of natural selection occurs when individuals with average traits are removed, resulting in two populations with extreme traits?
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1. Introduction to Biology
Natural Selection and Evolution
Multiple Choice
Which type of natural selection favors individuals of average size over those that are either much larger or much smaller?
A
Stabilizing selection
B
Balancing selection
C
Directional selection
D
Disruptive selection
Verified step by step guidance1
Understand the concept of natural selection: Natural selection is a process where individuals with traits better suited to their environment are more likely to survive and reproduce. Different types of natural selection affect populations in distinct ways.
Define stabilizing selection: Stabilizing selection is a type of natural selection that favors individuals with average traits, reducing variation in the population. It selects against extreme traits, such as being much larger or much smaller.
Compare stabilizing selection to other types: Directional selection favors one extreme trait over others, while disruptive selection favors both extremes and selects against average traits. Balancing selection maintains genetic diversity but does not specifically favor average traits.
Analyze the problem: The question asks which type of natural selection favors individuals of average size over extremes. Based on the definitions, stabilizing selection is the correct type because it reduces variation and favors average traits.
Conclude the reasoning: Stabilizing selection is the answer because it aligns with the description of favoring average-sized individuals while selecting against extremes, unlike the other types of natural selection listed.
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