Some cancer-fighting drugs disrupt the cell cycle by preventing the formation
of spindle fibers. which specific phase of the cell cycle is such a drug most
likely to disrupt?

I think during mitosis. Cancer fighting cells disrupt during the time when cells are splitting.

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.