Question

Sibling species can be distinguished on the basis of

• A. Morphospecies concept
• B. Biospecies concept
• C. Evolutionary species concept
• D. Keystone species concept

Answer 1

Answer: (B)

Biospecies concept

• Sibling species are those two or more related species that are nearly identical in external appearance but are incapable of producing fertile offspring.
  
• The biological species concept defines a species as members of populations that actually or potentially interbreed in nature to produce fertile offspring, not according to similarity of appearance. So, this concept can be used to distinguish between sibling species.
  

So, the correct answer is 'Biospecies concept'