Question:
Appearance of antibiotic-resistant bacteria is an example of
Appearance of antibiotic-resistant bacteria is an example of
Updated On: Jul 6, 2022
- adaptive radiation
- transduction
- pre-existing variation in the population
- divergent evolution
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The Correct Option is C
Solution and Explanation
When a bacterial population encounters a particular antibiotic, those sensitive to it die. But some bacteria having mutations become resistant to the antibiotic. Such resistant bacteria survive and multiply quickly as the competing bacteria have died. Soon the resistance providing genes become widespread and entire bacterial population becomes resistant
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Concepts Used:
Evolution
Evolution is a process that occurs in changes in the genetic content of a population over time. Evolutionary change is generally classified into two: microevolution and macroevolution. The process of changes in allele frequencies in a population over time is a microevolutionary process. Three main mechanisms that cause allele frequency change are natural selection, genetic drift, and gene flow. On the other hand, macroevolution refers to change at or above the level of the species.