Which of the following is used for the proper maintenance and preservation of pure cultures?
A. Periodic transfer to fresh media
B. Preservation by overlaying cultures with mineral oil
C. Preservation by lyophilization
D. All of the above
Answer:D
Which of the following is used for the proper maintenance and preservation of pure cultures?
A. Periodic transfer to fresh media B. Preservation by overlaying cultures with mineral oil C. Preservation by lyophilization D. All of the above