<prompt> R-factor in bacteria is transferred byTransductionTransformationConjugationVertical transmission  <response>: ConjugationBacterial conjugation is the transfer of genetic material between bacteria through direct cell to cell contact or through a bridge- like the connection between two cells.Conjugation is a process whereby a donor male bacterium makes physical contact with a recipient female bacterium.Donor status is determined by the presence of plasmid.This plasmid codes for specialized fimbria sex pilus and for self-transfer.Sex pilus conjugation tube helps in transfer of genetic material from male bacterium to female bacterium.The plasmid is known as transfer factor sex factor or fertility factor.The plasmid may be R factory which codes for transferrable multiple drug resistance.The DNA of the plasmid replicates during transfer so that each bacterium receives a copy Recipient becomes a donor and the donor retains its donor status. 