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microevolution
This term is primarily used in biological and scientific registers to describe genetic shifts within a population, such as the development of pesticide resistance in insects. It is distinguished from macroevolution, which refers to large-scale changes that result in the formation of entirely new species or taxonomic groups.
Because it describes a process or a biological phenomenon, it is typically treated as an uncountable noun. It focuses on the mechanism of change—such as natural selection or genetic drift—rather than a countable event.
Meanings
Evolutionary change that occurs on a small scale within a single population or species over a relatively short period of time.
The researchers studied the microevolution of antibiotic resistance in bacteria.
Examples
The professor explained how microevolution leads to changes in allele frequencies within a population.
The professor explained how microevolution leads to changes in allele frequencies within a population.
Antibiotic resistance in bacteria is a classic example of microevolution in action.
Antibiotic resistance in bacteria is a classic example of microevolution in action.
I wonder if this slight change in beak size is just microevolution or the start of something bigger.
I wonder if this slight change in beak size is just microevolution or the start of something bigger.
Microevolution occurs over a much shorter timeframe than macroevolution.
Microevolution occurs over a much shorter timeframe than macroevolution.
We are studying the microevolution of these insects to see how they adapt to pesticides.
Is it possible for microevolution to eventually result in the formation of a new species?
The rapid microevolution of the virus made the initial vaccine less effective.