An Example of Vertical Gene Transfer Is the

An example of vertical gene transfer is the

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.