Gametangial copulation (conjugation) is common in

Explanation

Transfer of Genetic material between two live Bacteria is called conjugation. It was first observed in 1946 by Lederberg and Tatum in Escherichia coli .
In E.coli, a small circular DNA strand occurs in the cytoplasm in addition to nucleoid called on F plasmid. The cell with F plasmid is called `F^(+)` cell and without F plasmid is called `F^(-)` cell. The `F^(+)` cerr or Donor cell produces the sex pilus that makes contact with the ricipient cell or `F^(-)` cell. During conjugation, `F^(+) and F^(-)` cells bind with each other with the help of sex pilus forms a bridge between them. The F plasmid replicates and the replicated Dnay passess through bridge to the `F^(-)` cell. The `F^(-)` cell becomes `F^(+)` cell as it receives the F plasmid . After conjugation, the two cells separate from each other .