Hugo Devries worked on :

Options

A. Oenothera lamarckiana
B. Lathyrus odoratus
C. Pisum sativum
D. Arachis hypogea

Answer

**Step-by-Step Solution:**

1. **Identify the Subject of the Question**: The question asks about the work of Hugo Devries, a notable figure in the field of genetics and evolution.

2. **Recall Key Contributions**: Hugo Devries is known for his work on the concept of mutations and variation in species. He conducted extensive studies on plant species.

3. **Focus on Specific Plant Studies**: Among the options provided, we need to identify which plant species Hugo Devries specifically worked on.

4. **Recognize the Correct Botanical Name**: Hugo Devries is particularly recognized for his studies on the evening primrose, which is scientifically known as Oenothera lamarckiana.

5. **Select the Correct Answer**: Based on the information, the correct answer to the question is Oenothera lamarckiana.

**Final Answer**: Hugo Devries worked on Oenothera lamarckiana.

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