Single step large Mutation is named as ……… X ……… by ………..Y …………… .
Find out the correct option for X and Y

Options

A. `{:(X,Y),("Speciation","Hugo deVreies"):}`
B. `{:(X,Y),("Saltation","Charles Darwin"):}`
C. `{:(X,Y),("Mutation","Charles Darwin"):}`
D. `{:(X,Y),("Saltation","Hugo deVries"):}`

Answer

To solve the question, we need to identify the correct terms for X and Y in the statement "Single step large Mutation is named as ……… X ……… by ………..Y …………… ."

### Step-by-Step Solution:

1. **Understanding the Terms**:
- We need to identify what a "single step large mutation" refers to in biological terms.
- This type of mutation is characterized by significant changes occurring in a single event rather than through gradual changes.

2. **Identifying X**:
- The term that describes a single step large mutation is known as "Saltation."
- Saltation refers to sudden and significant evolutionary changes that can occur due to large mutations.

3. **Identifying Y**:
- The scientist associated with the concept of Saltation is Hugo de Vries, not Charles Darwin.
- Hugo de Vries proposed the idea of Saltation in his studies of evolution and mutations.

4. **Final Statement**:
- Therefore, the complete statement becomes: "Single step large Mutation is named as Saltation by Hugo de Vries."

5. **Selecting the Correct Option**:
- From the options provided, the correct answer is option four: "Saltation by Hugo de Vries."

### Final Answer:
- X = Saltation
- Y = Hugo de Vries