Written by the Fiveable Content Team โข Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examโขWritten by the Fiveable Content Team โข Last updated September 2025
Definition
Evolutionary theories are explanations or frameworks that use principles of natural selection and adaptation to understand how certain traits, behaviors, or characteristics have developed and persisted over time within a species.
This term refers to the process by which individuals with beneficial traits are more likely to survive and reproduce, leading to those traits becoming more common in future generations.