There was a massive earthquake that separated a large population into two groups on opposite sides of a valley. If members of this population remain geographically isolated, what cannot occur?

Sympatric speciation

Explanation:

There may be more than one answer here, but concerning speciation, sympatric speciation can't occur because of the geographic isolation (must be living in the same environment for this to occur).

what have scientists found to be the most efficient and effective way to insert new sequences into an individual? a-scientists have created genetically altered foods that release dna during digestion. b-scientists use viruses to insert specific gene sequences. c-scientists irradiate genes so that they can be absorbed through the skin.