What kind of natural selection operates,when nature selects only one extreme trait of a character?

Options

A. Stabilizing selection
B. Disruptive selection
C. Directional selection
D. Normalising selection

Answer

To determine the type of natural selection that operates when nature selects only one extreme trait of a character, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Natural Selection**: Natural selection is a process where organisms better adapted to their environment tend to survive and produce more offspring. It can lead to changes in the traits of populations over time.

2. **Types of Natural Selection**: There are three main types of natural selection:
- **Stabilizing Selection**: This type favors the average or intermediate traits and selects against extreme traits. It reduces variation and maintains the status quo.
- **Disruptive Selection**: This type favors extreme traits at both ends of the spectrum and selects against the average traits. It can lead to the formation of two distinct groups within a population.
- **Directional Selection**: This type favors one extreme trait over the other, leading to a shift in the population's traits over time. It occurs when environmental changes favor individuals with a specific extreme trait.

3. **Identifying the Correct Type**: The question specifically asks for the type of natural selection that selects only one extreme trait. Based on the definitions:
- **Stabilizing Selection** does not apply because it favors intermediate traits.
- **Disruptive Selection** does not apply because it favors both extremes.
- **Directional Selection** is the correct answer as it specifically favors one extreme trait over the other.

4. **Conclusion**: Therefore, the type of natural selection that operates when nature selects only one extreme trait of a character is **Directional Selection**.

### Final Answer:
**Directional Selection**