Nucleus develops from a pre-existing nucleus. The finding was made by

Options

A. Farmer and Moore
B. Winiwater
C. Sutton
D. Strasburger

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks who discovered that the nucleus develops from a pre-existing nucleus. This concept is fundamental in cell biology and relates to how cells divide and replicate.

2. **Identifying the Options**: The options provided are:
- A) Farmer and Morey
- B) Winnewater
- C) Sutton
- D) Strasburger

3. **Researching the Scientists**:
- **Farmer and Morey**: Known for their work in plant cytology but not specifically for the nucleus development concept.
- **Winnewater**: Less known in the context of nuclear development.
- **Sutton**: Known for the chromosome theory of inheritance but not specifically for nucleus development.
- **Strasburger**: A prominent figure in plant cytology who made significant contributions to our understanding of cell division and the nucleus.

4. **Identifying the Correct Answer**: Based on the information gathered, it is clear that Strasburger is the scientist who stated that the nucleus develops from a pre-existing nucleus.

5. **Final Answer**: The correct answer is **D) Strasburger**.