Which of the following is a problem for the application of the biological species concept?

• A. It is applicable to all living organisms.
• B. It cannot be applied to asexual organisms.
• C. It is based on morphological differences.
• D. It relies on genetic similarity.

Answer: (B)

Verified step by step guidance

1. Understand the biological species concept: It defines a species as a group of individuals that can interbreed and produce fertile offspring in natural conditions.
2. Identify the limitations of the biological species concept: It primarily applies to sexually reproducing organisms and relies on reproductive isolation to define species boundaries.
3. Consider the applicability to asexual organisms: Asexual organisms do not reproduce through interbreeding, making it difficult to apply the biological species concept to them.
4. Evaluate the other options: The concept is not based solely on morphological differences or genetic similarity, but rather on the ability to reproduce and produce fertile offspring.
5. Conclude that the main problem with the biological species concept is its inapplicability to asexual organisms, as they do not fit the criteria of interbreeding and producing fertile offspring.