During a storm a tree fell over into a river what might happen to this tree

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.

answer; ///(b) it is composed of four protein chains and four heme groups;