The cichlid Cynotilapia afra, introduced at West Thumbi Island in Lake Malawi in the 1960s, has split into two genetically distinct populations, located at the north and south ends of the island. How can scientists determine whether these populations are now different species, according to the biological species concept?

Determine whether individuals from one population will interbreed with individuals from the other population when introduced into each other's native habitats

Explanation:

According to the biological species concept, organisms can be considered to be of the same species if they can interbreed successfully together to produce a viable and fertile offspring.

Therefore, to determine whether these populations are now different according to the biological species concept, scientists should introduce both individuals from each population to each other. If they are able to interbreed and produce viable and fertile offspring, it means they are of the same species, but if they are unable, it means they are not of the same species.

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