Which scientist showed that the green substances in plant ( chlorophyll) is located m special bodies ( chloroplast) within plant cells?

Options

A. Julius von Sachs
B. Cornelius van Niel
C. T. W. Engelmann
D. Jan Ingenhousz

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which scientist demonstrated that chlorophyll, the green pigment in plants, is located in special structures called chloroplasts within plant cells.

2. **Identifying the Options**: The options provided are:
- Option 1: Zoolis Vonsax
- Option 2: Nellis Van Neel
- Option 3: T.W. Engelman
- Option 4: Zan Engel's house

3. **Researching the Scientists**:
- Zoolis Vonsax is known for his contributions to the understanding of photosynthesis and the role of chlorophyll.
- Nellis Van Neel, T.W. Engelman, and Zan Engel's house are not primarily associated with the discovery of chloroplasts.

4. **Identifying the Correct Scientist**: Zoolis Vonsax is the correct answer. He was a German botanist who conducted experiments that led to the understanding of chlorophyll's location in chloroplasts.

5. **Describing the Experiment**: Vonsax performed an experiment where he used leaves that had been exposed to sunlight. He bleached the leaves and then stained them with iodine. The leaves that had been exposed to sunlight turned black, indicating the presence of starch, which is produced during photosynthesis in chloroplasts.

6. **Conclusion**: Therefore, the scientist who showed that chlorophyll is located in chloroplasts within plant cells is Zoolis Vonsax.

**Final Answer**: Zoolis Vonsax

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