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HomeHomework HelpbiologyAntibiotic Resistance

Antibiotic Resistance

Antibiotic resistance refers to the ability of bacteria to survive and proliferate despite the presence of antibiotics that would normally inhibit their growth or kill them. This phenomenon occurs through evolutionary processes, such as natural selection, where resistant strains are favored and become more prevalent in a population over time.

intermediate
2 hours
Biology
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Overview

Antibiotic resistance is a growing global health concern that arises when bacteria evolve to withstand the effects of antibiotics. This phenomenon is driven by natural selection, where bacteria that survive antibiotic treatment can reproduce and pass on their resistant traits. The misuse and overuse...

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Key Terms

Antibiotic
A type of medicine that kills or inhibits the growth of bacteria.

Example: Penicillin is an antibiotic used to treat bacterial infections.

Bacteria
Single-celled microorganisms that can be beneficial or harmful.

Example: E. coli is a common bacterium found in the intestines.

Mutation
A change in the DNA sequence of an organism.

Example: Some bacteria mutate to resist antibiotics.

Natural Selection
The process where organisms better adapted to their environment tend to survive and produce more offspring.

Example: Bacteria that survive antibiotic treatment can reproduce and pass on resistance.

Gene Transfer
The movement of genetic material between organisms.

Example: Bacteria can share resistance genes through plasmids.

Selection Pressure
Environmental factors that influence which individuals survive and reproduce.

Example: The use of antibiotics creates selection pressure on bacteria.

Related Topics

Vaccines
Learn how vaccines help prevent infections and reduce the need for antibiotics.
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Microbial Genetics
Explore the genetic mechanisms behind bacterial behavior and resistance.
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Infectious Diseases
Study various infectious diseases and their relationship with antibiotic resistance.
intermediate

Key Concepts

EvolutionNatural SelectionBacterial MutationPublic Health