Question
1:35 LTE 214 types of selection : MULTIPLE-CHOICE QUESTION Pick the type of correct type of Natural Selection after reading the example. The fat elephants are too slow and can't avoid predators or poachers, so they die. Only the very skinny can survive and have offspring. Disruptive Selection Directional Selection Stabalizing Selection Rewatch Next Question
Ask by Valdez Smith. in the United States
Jan 22,2025
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Tutor-Verified Answer
Answer
The correct type of Natural Selection is **Directional Selection**.
Solution
The scenario described involves **Directional Selection**. Here's why:
- **Directional Selection** occurs when natural selection favors one extreme of a trait's variation. In your example, the very skinny elephants have a survival advantage over the fat ones, leading to a shift in the population toward the skinny phenotype.
The other types of selection are defined as follows:
- **Disruptive Selection** favors both extremes over the intermediate, potentially leading to two distinct populations.
- **Stabilizing Selection** favors the average individuals in a population, reducing variation.
Given the example, the correct answer is:
**Directional Selection**
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Simplify this solution Extra Insights
In this scenario, we see how the fat elephants struggle to survive due to their lack of speed, while the skinny ones thrive and reproduce. This illustrates **Directional Selection**, where one extreme trait (being skinny) is favored over the others, leading to a shift in the population's traits over time. To gain a better understanding, think about the Galápagos finches: during droughts, birds with larger beaks thrived as they could crack tougher seeds. This is another classic case of directional selection impacting the evolution of species based on environmental pressures and survival traits.
