Conjugation
Temporary fusion of two single-celled organisms for the purposes of exchanging genetic information.
2. A temporary union of two single celled organisms with at least one of them receiving genetic material from the other; in bacteria the exchange is unidirectional with the donor cell extruding all or a portion of one of its chromosomes into the recipient cell
Conserved sequence
A base sequence in a DNA molecule (or an amino acid sequence a protein) that has remained essentially unchanged throughout evolution.

