Who was the first to observe living substance in the cells

Options

A. Anton van Leeuwenhoek
B. Alfonso Corti
C. Robert Brown
D. Johannes Purkinje

Answer

To answer the question "Who was the first to observe living substance in the cells?", we can follow these steps:

1. **Identify the Scientists Listed**: The question provides four options: Anton von Leeuwenhoek, Alfonso Corti, Robert Brown, and Jonas Purkanji.

2. **Understand the Context**: The question specifically asks about the first observation of living substances in cells, which is different from observing dead cells.

3. **Recall Historical Contributions**:
- Robert Hooke is known for his work with cells but he observed dead cells in cork and coined the term "cell".
- Anton von Leeuwenhoek is recognized for his pioneering work in microscopy and was the first to observe living microorganisms in water and other substances.

4. **Select the Correct Scientist**: Given that Leeuwenhoek was the first to observe living cells (like bacteria and protozoa), he is the correct answer to the question.

5. **Conclusion**: Therefore, the first scientist to observe living substances in cells is **Anton von Leeuwenhoek**.