Who gave the biological concept of species?

Options

A. Aristotle
B. Ernst Mayr
C. John Ray
D. Carolus Linnaeus

Answer

To answer the question "Who gave the biological concept of species?" we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Options**: The options provided are Aristotle, Ernst Mayr, John Ray, and Carolus Linnaeus.

2. **Evaluate Each Option**:
- **Aristotle**: He was known for developing a system of classification of animals but did not specifically provide the biological concept of species. Thus, this option is incorrect.
- **Ernst Mayr**: He is a prominent figure in biology who specifically contributed to the biological concept of species. He classified organisms based on reproductive isolation and morphology, making this option correct.
- **John Ray**: He is known for his work in defining species but did not develop the biological concept as thoroughly as Mayr. Therefore, this option is not the best answer.
- **Carolus Linnaeus**: He is recognized as the father of taxonomy and developed a system for naming organisms but did not provide the biological concept of species. Thus, this option is also incorrect.

3. **Conclusion**: Based on the evaluations, the correct answer is **Ernst Mayr**, who gave the biological concept of species based on reproductive isolation and morphology.

### Final Answer:
The biological concept of species was given by **Ernst Mayr**.

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