Final answer:
Conjugation, transformation, and transduction are three mechanisms by which bacteria increase their genetic diversity through DNA transfer.
Step-by-step explanation:
Conjugation, transformation, and transduction are three mechanisms by which prokaryotes, such as bacteria, increase their genetic diversity. In conjugation, DNA is transferred from one bacterium to another by means of a pilus. In transformation, bacteria take up DNA from their environment. In transduction, viruses that infect bacteria carry DNA from one bacterium to another.