mayr's biological concept of species is mainly based on

Options

A. morphological feature
B. morphology and method reproduction
C. method of reproduction only
D. reproductive isolation

Answer

**Step-by-Step Solution:**

1. **Understanding Mayr's Biological Concept of Species**: Ernst Mayr proposed a biological species concept that focuses on the ability of populations to interbreed and produce viable offspring. This concept emphasizes reproductive isolation as a key factor in defining species.

2. **Analyzing the Options**:
- **Option A: Morphological Feature**: This option suggests that Mayr's concept is based solely on physical characteristics. While morphology is important, it is not the main focus of Mayr's concept.
- **Option B: Morphology and Method of Reproduction**: This option combines physical traits and reproductive methods. However, Mayr's concept does not emphasize the method of reproduction itself but rather how it relates to reproductive isolation.
- **Option C: Method of Reproduction Only**: This option implies that Mayr's concept is solely about how reproduction occurs. This is misleading as it overlooks the importance of reproductive isolation.
- **Option D: Reproductive Isolation**: This is the correct option. Mayr's biological concept of species primarily revolves around reproductive isolation, which prevents different species from interbreeding and maintains distinct species.

3. **Conclusion**: The correct answer to the question is "Reproductive Isolation," as it encapsulates the essence of Mayr's biological species concept.