Plasmid may be defined as the extra chromosomal circular DNA present in bacteria. This DNA can show independent replication apart from the normal chromosomal DNA.
The plasmid can be transferred and used for the insertion of the desired genes. These plamsid is used in recombinant DNA technology and the desired gene can be multiplied inside the plasmid. Plasmid is used as a vector in recombinant DNA technology.
Tube 1 doesn't contain an organism so it can't be that one. Both a snail and a plant are considered an organism, and cellular respiration occurs in almost any organism's cells
