Which scientist stated that it is the mutation which causes evolution and not the minor variations?

Options

A. Oparin
B. Lamarck
C. de Vries
D. Darwin

Explanation

**Step-by-Step Solution:**

1. **Identify the Question:** The question asks which scientist proposed that mutations, rather than minor variations, are the primary cause of evolution.

2. **Recall Relevant Information:** The scientist known for emphasizing the role of mutations in evolution is Hugo de Vries. He argued that mutations are sudden genetic changes that can lead to significant evolutionary changes.

3. **Explain Hugo de Vries's Theory:** Hugo de Vries proposed that these mutations are irreversible and can be passed down through generations. Over time, these accumulated mutations can lead to the emergence of new traits or even new species.

4. **Differentiate from Other Theories:** It is important to distinguish de Vries's ideas from those of other scientists like Lamarck and Darwin. Lamarck focused on the inheritance of acquired characteristics, while Darwin emphasized natural selection.

5. **Conclusion:** Therefore, the scientist who stated that it is the mutation which causes evolution and not minor variations is Hugo de Vries.

**Final Answer:** Hugo de Vries.

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