Farmers have bred corn plants over many generations to produce larger kernels and higher yields without using laboratory techniques. Which process best describes this practice?

A pharmaceutical company inserts the human insulin gene into bacteria so the bacteria can produce insulin in large quantities. Which field is mainly being applied in this situation?

A scientist transfers the nucleus of a skin cell into an ovum to create a genetically identical embryo. What technique is being used?

During a laboratory experiment, restriction enzymes cut both a human gene and a bacterial plasmid, after which the gene is joined to the plasmid. Which step of recombinant DNA technology does this describe?

After introducing recombinant plasmids into bacteria, researchers screen the cells to identify which ones successfully received the desired gene. Which step of recombinant DNA technology is this?