Which of the following is key to the development of individual species?

Question

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Reproductive isolation refers to the barriers that prevent different species from interbreeding and thus forming hybrid offspring. This is key to the development of individual species because it maintains the genetic integrity of a species and prevents it from intermixing with other species. Microevolution refers to small-scale changes in the genetic makeup of a population, which can lead to the development of new traits, but typically does not result in the formation of a new species. Gene flow refers to the movement of genes between populations, which can introduce new genetic variation, but typically does not lead to the formation of a new species. Equilibrium refers to a state of balance between opposing forces, and is not directly related to the development of individual species.

Which of the Following Is Key to the Development of Individual