process involves transferring of genetic material from one bacterium to another through bacteriophage.

Statement $\left(\mathrm{S}\right):$ In ciliates, conjugation restores the vigour and vitality which are lost due to chromosomal imbalance in the macronuclei due to repeated amitotic divisions.

Reason $\left(\mathrm{R}\right):$ Conjugation is temporary union of senile ciliates belonging to same mating types. It often prevents exchange of nuclear material.

When viral genome can become integrated into the bacterial genome they are known as prophage or bacteriophage?

Fill in the blank with the appropriate word given in the bracket.

(recipient, donor, vector, episome)

Bacteriophage serves as a _____during the process of transduction in bacteria.

Name the following:

The mode of bacterial genetic recombination discovered by Frederick Griffith.