Final answer:
In horizontal gene transfer, Transformation involves uptake of free DNA from the environment, Transduction is DNA transfer by a bacteriophage, and Conjugation is the transfer of genetic material between bacterial cells via a conjugation pilus.
Step-by-step explanation:
The question is asking to match descriptions of horizontal gene transfer mechanisms with their appropriate terms in bacteria. Here are the matches:
- Transformation: This is when bacteria take up free DNA from their extracellular environment.
- Transduction: This is the mechanism by which a bacteriophage, or bacterial virus, facilitates the transfer of DNA from one bacterial cell to another.
- Conjugation: This process involves the union of two bacterial cells, during which a conjugation pilus transfers genetic material from a donor cell to a recipient cell.