Change Over Time

Evolution is the process by which species change over generations. Adaptations are traits that help organisms survive and reproduce in their environments.

How Evolution Works

• Natural Selection: Organisms with helpful traits are more likely to survive and have offspring.
• Adaptation: Over time, certain traits become more common because they are beneficial.
• Variation: Differences exist within species, which can lead to new adaptations.

Evidence for Evolution

• Fossils show how life has changed over millions of years.
• Similarities in DNA and body structures connect different species.

Why Evolution Matters

Understanding evolution helps scientists develop new medicines and protect endangered species.