Robert Brown is a well known scientist as he discovered __________.

Options

A. Lysosome
B. Vacuole
C. Cell
D. Nucleus

Answer

**Step-by-Step Solution:**

1. **Identify the Scientist**: The question asks about Robert Brown, who is a well-known scientist.

2. **Understand His Contribution**: Robert Brown is recognized for his significant discovery in the field of biology.

3. **Clarify the Discovery**: While there are many scientists associated with cell biology, Robert Brown is specifically known for discovering the nucleus within the cell.

4. **Define the Nucleus**: The nucleus is often referred to as the "brain" of the cell, as it contains the genetic material (DNA) and is responsible for controlling the cell's activities.

5. **Conclusion**: Therefore, the answer to the question is that Robert Brown discovered the nucleus.

**Final Answer**: Robert Brown is a well-known scientist as he discovered the nucleus.

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