The conversion of plasmagel into plasmasol and vice versa in Amoeba was first studied by

Options

A. Pantin
B. Hymen
C. Mast
D. Taylor

Answer

To solve the question regarding who first studied the conversion of plasmagel into plasmasol and vice versa in Amoeba, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Plasmagel**: This refers to the gel-like outer layer of the cytoplasm in Amoeba, which is more solid in nature.
- **Plasmasol**: This is the more liquid part of the cytoplasm, which is fluid in nature.

2. **Recognize the Process**:
- The conversion between plasmagel and plasmasol is crucial for the movement and locomotion of Amoeba. This process allows the organism to extend its pseudopodia and move.

3. **Identify the Scientist**:
- The question asks who first studied this conversion. The options provided are Penton, Hyman, Mast, and Taylor.

4. **Recall Historical Context**:
- The conversion of plasmagel to plasmasol and vice versa was first studied by a scientist named Mast. He proposed the Sol-gel theory, which explains how Amoeba moves by changing the state of its cytoplasm.

5. **Conclude the Answer**:
- Based on the information, the correct answer to the question is **Mast**.

### Final Answer:
The conversion of plasmagel into plasmasol and vice versa in Amoeba was first studied by **Mast**.

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