Alf lifts weights vigorously for 25 minutes. a few hours after exercise, he notices that his muscles are sore and slightly swollen. his muscle cells have experienced that led to production of a) fermentation; alcohol b) nitrogen fixation; water c) anaerobic respiration; lactate d) aerobic respiration; carbon monoxide

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.

so whats the answer