Microevolution can be said to have taken place when a. a population experiences a shift in allele frequencies. b. a feature of an individual animal changes through use or disuse. c. a mutation occurs in a population. d. several mutations occur in a population. e. when a population has different forms of the same gene.

Explanation:

Explanation:

Microevolution: Evolutionary change within a species or small group of organisms, mainly over a short period/ in a short duration of period.

Microevolution :  taken place when a population experiences a shift in allele frequencies.

Examples of microevolution: Pesticide resistance, antibiotic resistance, herbicide resistance, and many others.

the answer is: trichonympha lives in the gut of termites and digests cellulose eaten by the termite.

this is an example of a symbiotic association of a protozoan with its mode of association.

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