Single step large mutation leading to speciation is also called

Options

A. founder effect
B. saltation
C. branching descent
D. natural selection.

Explanation

To answer the question "Single step large mutation leading to speciation is also called," we need to identify the term that describes this specific evolutionary process.

### Step-by-Step Solution:

1. **Understanding Speciation**: Speciation is the process through which new species arise. It can occur through various mechanisms, including gradual changes over time or sudden changes due to mutations.

2. **Types of Mutations**: Mutations can be classified into two categories: small (point mutations) and large (chromosomal mutations). Large mutations can lead to significant changes in an organism's genetic makeup.

3. **Single Step Large Mutation**: A single step large mutation refers to a significant genetic change that occurs in one event rather than through gradual changes. This type of mutation can lead to the formation of a new species.

4. **Term for This Process**: The term that describes a single step large mutation leading to speciation is "macromutation." Macromutations are large-scale genetic changes that can result in the immediate formation of a new species.

5. **Conclusion**: Therefore, the answer to the question is that a single step large mutation leading to speciation is also called a "macromutation."