In the early 1980s scientists were able to produce two biomolecules by splicing a human gene into the bacterium e. coli to make recombinant human insulin and growth hormone. which statement best explains why this experiment was successful? a) human cells are eukaryotic, and e. coli cells are prokaryotic. b) all living organisms share the same genome. c) the genes for all organisms are composed of the same building blocks. d) the human body contains many types of bacteria, including e. coli.