Who postulated the mutation theory?

Options

A. GJ Mendel
B. Charles Darwin
C. J B Lamarck
D. Hugo de Vries

Explanation

**Step-by-Step Text Solution:**

1. **Identify the Question**: The question asks, "Who postulated the mutation theory?"

2. **Review the Options**: The options provided are:
- A. G. J. Mendel
- B. Charles Darwin
- C. J. B. Lamarck
- D. Hugo de Vries

3. **Recall Relevant Information**: The mutation theory is a significant concept in evolutionary biology. It suggests that new species arise not through gradual changes (as proposed by Darwin) but through sudden, large changes known as mutations.

4. **Determine the Correct Answer**:
- G. J. Mendel is known for his work on inheritance and genetics, not mutation theory.
- Charles Darwin is famous for the theory of natural selection, which emphasizes gradual evolution.
- J. B. Lamarck proposed the theory of inheritance of acquired characteristics, which is different from mutation theory.
- Hugo de Vries is credited with postulating the mutation theory, which emphasizes that new species arise due to sudden mutations.

5. **Conclusion**: Based on the information reviewed, the correct answer is **D. Hugo de Vries**.

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