Nucleus was discovered in root cells of orchids by

Options

A. Robert Brown
B. Robert Hooke
C. Straburger
D. Bowman

Answer

### Step-by-Step Solution:

1. **Identify the Question**: The question asks about the scientist who discovered the nucleus in the root cells of orchids.

2. **Review the Options**: The options provided are:
- Robert Brown
- Robert Hooke
- Strasburger
- Baumann

3. **Understand Each Scientist's Contribution**:
- **Robert Hooke**: In 1665, he discovered cells but not specifically the nucleus.
- **Strasburger**: Eduard Strasburger studied nuclear and cellular division in algae and higher plants but did not discover the nucleus.
- **Baumann**: Sir William Bowman is known for his work related to the kidneys, specifically the Bowman's capsule, and is not related to the discovery of the nucleus.

4. **Focus on Robert Brown**: In 1831, Robert Brown was investigating the fertilization mechanisms of plants in the Orchidaceae family. During his research, he observed a structure within the cells of orchids and named it the nucleus.

5. **Conclusion**: Based on the information, the correct answer is Robert Brown, as he was the one who discovered the nucleus in the root cells of orchids.

### Final Answer:
The nucleus was discovered in root cells of orchids by **Robert Brown**.

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