Natural Selection

• What is natural selection?

  When the best adapted organisms survive and reproduce
• Who proposed the idea of natural selection?

  Charles Darwin
• What helps an organism survive?

  A helpful characteristic (adaptation)
• What happens to helpful traits over time?

  They spread in the population
• What causes variation between individuals?

  Differences in genes
• What is the concept of "survival of the fittest"?

  • The idea that organisms best adapted to their environment survive
  • Those that are less adapted tend to die off
• How do helpful traits pass to offspring?

  • Through genetic inheritance
  • Traits are encoded in genes passed from parents