In a laboratory bacterial cell culture that has been infected by a virus, plaques are areas in which
a. bacterial cells are resistant to the virus and have not been infected.
b. there is no nutrient available for the bacteria to grow.
c. the virus has spread and left behind the remains of dead cells.
d. the virus has not yet spread to that area of cells.
Ans: c. the virus has spread and left behind the remains of dead cells.
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