A population of Staphylococcus aureus bacteria Yellow bacteria are killed by methicillin, while red bacteria are genetically resistant. Treatment with the antibiotic methicillin is represented by a kitchen strainer. Many generations later Methicillin-resistant bacteria S. aureus (MRSA) survives and reproduces over time.
Microbial Physiology
Microbial physiology is the branch of microbiology that is associated with studying the physiology of fungi, bacteria, and viruses. It is an important field of science concerning functional genomics and metabolic engineering.
Chemotaxis
The organism’s movement in a particular direction as a response to certain chemicals that are available in the environment is defined as chemotaxis. In brief, it can be defined as the occurrence of an organism’s movement in response to a certain chemical stimulus.
Q1: What is natural selection selecting for here? Q2: Why do bacteria that are not genetically resistant to antibiotics die out when exposed to antibiotics? Q3: Why is the antibiotic represented by a kitchen strainer in this figure?
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