A) development of many genetically diverse mesorhizobia via incorporation of a 500 kB segment from a mesorhizobium. B) uptake of beta-lactamase genes by Streptococcus pneumoniae. C) transfer of CRISPR spacers to daughter cells during cell division. D) transfer of a Ti plasmid from agrobacterium to a plant. E) transfer of conjugative plasmids from one strain to another.