Examlex
How are B-cell receptors different from T-cell receptors?
Genetic Drift
A mechanism of evolution that causes allele frequencies within a population to change randomly with time due to chance events.
Natural Selection
A process by which species evolve over time as individuals with traits more suited to their environment are more likely to survive and reproduce.
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.
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