Question

why is it important for us to isolate a single colony of bacteria from the chicken farm sample?
a) a single colony will show the bacteria are resistant to antibiotics
b) we require a sample in which all the bacteria cells are genetically identical
c) we need to identify if the bacteria are salmonella
d) if a single colony grows we know its the same strain of bacteria that infected max

Explanation:

A single - colony of bacteria is derived from a single parent cell through binary fission, resulting in genetically identical cells. This pure culture is crucial for accurate identification, study of characteristics, and other microbiological analyses. Option a is not always true as a single colony doesn't inherently show antibiotic resistance. Option c can be done with a pure culture but is not the over - arching reason for isolation. Option d is too specific and not the general reason for isolating a single colony.

Answer:

B. We require a sample in which all the bacteria cells are genetically identical