The term Protista was introduced by German Biologist and Philosopher

Options

A. John Ray
B. Robert Grant
C. Ernst Haeckel
D. Leuckart

Answer

To answer the question about who introduced the term "Protista," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Term "Protista":**
- The term "Protista" refers to a kingdom that includes unicellular eukaryotic organisms.

2. **Identify the Options:**
- The options provided are John Ray, Robert Grant, Ernst Haeckel, and Leucard.

3. **Evaluate Each Option:**
- **John Ray:** Known for his work on the concept of species in taxonomy, but he did not introduce the term "Protista." Therefore, this option is incorrect.
- **Robert Grant:** He studied sponges and marine vertebrates but did not coin the term "Protista." Thus, this option is also incorrect.
- **Ernst Haeckel:** A German biologist and philosopher who introduced the term "Protista" in 1866. This is the correct option.
- **Leucard:** He conducted research on tapeworms and did not introduce the term "Protista." Hence, this option is incorrect.

4. **Conclusion:**
- The correct answer is **Ernst Haeckel**, who first introduced the term "Protista" in the year 1866.

### Final Answer:
The term "Protista" was introduced by German biologist and philosopher **Ernst Haeckel** in 1866.

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