Draw one or more diagrams that show how bacteria undergoes natural selection to become antibiotic-resistant. Include the steps and the environments in which the bacteria are located.
Make sure to have the following labeled or included in the diagram.
The different parts of natural selection and how this looks for the organism
Changes in the genetic makeup of the organisms that lead to adaptations
All possible adaptations in the populations
How the trait becomes widespread in the populations
Diagram 1: Natural Selection in Bacteria for Antibiotic Resistance
1. Environment: Bacteria population in a human body treated with antibiotics
2. Step 1: Antibiotics are introduced
3. Step 2: Some bacteria have genetic mutations that make them resistant to the antibiotics
4. Step 3: Antibiotics kill off susceptible bacteria, leaving behind resistant bacteria
5. Step 4: Resistant bacteria reproduce and pass on the resistance trait to their offspring
6. Step 5: Over time, the population becomes predominantly antibiotic-resistant
Diagram 2: Adaptations in Bacteria for Antibiotic Resistance
1. Environment: A petri dish with different strains of bacteria exposed to antibiotics
2. Step 1: Normal bacteria have no resistance to antibiotics
3. Step 2: Random genetic mutations occur in some bacteria, leading to antibiotic resistance
4. Step 3: Resistant bacteria survive and reproduce, passing on the resistance gene
5. Step 4: Different adaptations may arise, such as efflux pumps, target modification, or enzymatic inactivation of antibiotics
6. Step 5: Resistant bacteria outcompete susceptible bacteria and become predominant in the population.