Which process best describes the emergence of new species through reproductive isolation and genetic divergence?

Which process best describes the emergence of new species through reproductive isolation and genetic divergence?

• A. Migration
• B. Mutation
• C. Genetic drift
• D. Speciation

Answer: (D)

Speciation is the formation of a new species when populations become reproductively isolated and accumulate genetic differences until they can no longer interbreed to produce viable, fertile offspring. When barriers to mating arise, gene flow between groups stops, allowing each population to evolve separately through mutation, natural selection, and genetic drift. Over time, these changes add up, creating distinct genetic differences that prevent interbreeding and define a new species. While mutation, migration, and drift contribute to variation and divergence, speciation specifically describes the emergence of a new species through isolation and accumulated differences.

Speciation is the formation of a new species when populations become reproductively isolated and accumulate genetic differences until they can no longer interbreed to produce viable, fertile offspring. When barriers to mating arise, gene flow between groups stops, allowing each population to evolve separately through mutation, natural selection, and genetic drift. Over time, these changes add up, creating distinct genetic differences that prevent interbreeding and define a new species. While mutation, migration, and drift contribute to variation and divergence, speciation specifically describes the emergence of a new species through isolation and accumulated differences.