The biological concept of species was formulated by

Options

A. Mayr
B. Stebbins
C. Heywood
D. Love

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about who formulated the biological concept of species. This concept is crucial in biology as it helps in classifying organisms.

2. **Identifying the Key Figure**: The video transcript mentions that the biological concept of species was proposed by "mayor." However, this seems to be a typographical error. The correct name is "Mayr," referring to Ernst Mayr, a prominent biologist known for his work in systematics and the biological species concept.

3. **Defining the Biological Species Concept**: The biological species concept, as proposed by Mayr, states that a species is a group of organisms that can interbreed and produce fertile offspring. This means that members of the same species share a common gene pool and are reproductively isolated from other groups.

4. **Criteria for Classification**: According to Mayr, the classification of species is based on reproductive isolation. This means that members of different species cannot interbreed successfully, which maintains the distinctiveness of each species.

5. **Conclusion**: Based on the information provided, the answer to the question is that the biological concept of species was formulated by Ernst Mayr.

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

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