Who conducted the famous Avena curvature test ?

Answer

### Step-by-Step Solution:

1. **Identify the Experiment**: The question asks about the Avena curvature test, which is a well-known experiment in plant biology.

2. **Determine the Scientist**: The Avena curvature test was conducted by a Dutch biologist.

3. **Name the Scientist**: The scientist who conducted this test is F. W. Went.

4. **Year of the Experiment**: F. W. Went performed the Avena curvature test in the year 1928.

5. **Purpose of the Experiment**: The main purpose of the Avena curvature test was to demonstrate the presence of auxins in plants, which are plant hormones responsible for growth.

6. **Methodology**: In the experiment, an agar block containing auxin was placed on a decapitated coleoptile (the protective sheath covering the emerging shoot of a seedling). The curvature of the coleoptile was then measured to assess the effect of auxin.

7. **Conclusion**: Therefore, the answer to the question is that the famous Avena curvature test was conducted by F. W. Went in 1928.

### Final Answer:
The Avena curvature test was conducted by F. W. Went in 1928.

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