How Species Change Over Time

Evolution explains the diversity of life on Earth. Natural selection, a concept introduced by Charles Darwin, is the process where organisms better suited to their environment survive and reproduce.

Key Concepts

• Variation: Individuals in a population are different.
• Selection: Those with advantageous traits are more likely to survive.
• Adaptation: Over time, beneficial traits become more common.

Evidence for Evolution

• Fossil records
• Comparative anatomy
• DNA similarities

Why It Matters

Understanding evolution helps us combat antibiotic resistance, conserve endangered species, and improve agriculture.