What is an exception to the standard biological species concept used to define a species?

Question

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The standard biological species concept defines a species as a group of organisms that can interbreed and produce viable, fertile offspring. However, this concept does not apply to asexual species, as they do not reproduce sexually and therefore cannot interbreed with individuals of other species. In other words, asexual species cannot be distinguished using the standard biological species concept.

What Is an Exception to the Standard Biological Species Concept