Question

1. describe how speciation occurs when populations become isolated.

Explanation:

When populations become isolated, they are unable to interbreed. Over time, genetic drift, mutation, and natural selection act differently on each isolated population. These processes lead to the accumulation of genetic differences. Eventually, the genetic differences become so great that the populations can no longer interbreed even if they come into contact again. This reproductive isolation is the key factor in speciation.

Answer:

When populations are isolated, lack of interbreeding occurs. Genetic drift, mutation, and natural selection act differently on each isolated group. Genetic differences accumulate. Eventually, reproductive isolation (inability to interbreed) develops, leading to speciation.