who observed few living cells capable of moving , such as bacteria, protozo, spermatozoa and red blood corpuscles under his designed microscope?

Options

A. Aristotle
B. Robert Hooke
C. Leeuwenhoek
D. Purkinje

Answer

To answer the question of who observed living cells capable of movement, such as bacteria, protozoa, spermatozoa, and red blood corpuscles under his designed microscope, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Context of the Question**: The question is asking about a scientist who observed living cells using a microscope. This indicates that we are looking for a historical figure in the field of microscopy and cell biology.

2. **Recall the Contributions of Robert Hooke**: Robert Hooke is known for his discovery of cells, but he observed dead cells in a cork slice. He did not observe living cells. His work laid the groundwork for cell theory but did not involve moving or living cells.

3. **Identify the Key Scientist**: The scientist who is credited with observing living cells is Anton van Leeuwenhoek. He is known for his advancements in microscopy and for being the first to observe and describe living microorganisms.

4. **Highlight Leeuwenhoek's Observations**: Anton van Leeuwenhoek used his own designed microscope to observe various living cells, including bacteria, protozoa, spermatozoa, and red blood cells. His observations were groundbreaking and provided significant insights into the microscopic world.

5. **Mention Specific Discoveries**: In 1674, Leeuwenhoek studied free-living algae and discovered Spirogyra cells in pond water, which further exemplified his contributions to the study of living cells.

### Final Answer:
The scientist who observed few living cells capable of moving, such as bacteria, protozoa, spermatozoa, and red blood corpuscles under his designed microscope, is **Anton van Leeuwenhoek**.

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