Biology
Grade-9
Easy
Question
Identify the type of natural selection:
Small sized turtles are very weak in order to protect themselves from predators and larger turtles are very slow so as to escape from predators. Average-sized turtles have the highest fitness in this population.
- Stabilizing selection
- Disruptive selection
- Directional selection
- Genetic drift
Hint:
This type of natural selection occurs when there are selective pressures working against two extremes of a trait and therefore the intermediate or “middle” trait is selected for.
The correct answer is: Stabilizing selection
Stabilizing selection occurs when there are selective pressures working against two extremes of a trait and therefore the intermediate or “middle” trait is selected for. In this case, average sized turtles or the intermediary category is favored.
Hence, it is Stabilizing Selection.
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