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A sneeze expels irritant material mainly from the esophagus.
Adaptive Evolution
The process through which populations become better suited to their environment through changes in genetic traits.
Nonadaptive Evolution
Evolutionary changes that occur without improving the biological fitness of an organism, often due to genetic drift.
Genetic Drift
A mechanism of evolution involving random fluctuations in gene frequencies within a population that can lead to significant genetic changes over time.
Mutation
A mutation is any change to the genomic sequence of an organism.
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