A population of bacteria sees an increase in the number of bacteria resistant to a certain antibiotic over a number of generations. This is known as .

MICROEVOLUTION

Explanation: Microevolution simply means those changes in the alleles frequencies of an organism over time.

In other words,we will say that microevolution is the generation to generation change in a population's frequencies of alleles.

These changes can occur due to natural or artificial selection,

Gene flow, mutation and genetic drift.

From the question asked,when a population of bacteria sees an increase in the number of bacteria resistant to a certain antibiotic over a number of generations,it is simply known as microevolution.

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