7.1 Introduction to Evolution and Natural Selection

“Nothing in biology makes sense except in the light of evolution”—Theodosius Dobzhansky.

To Think About:

What is natural selection? What factors influence natural selection? How does natural selection affect populations?


Watch: AP Daily Video Introduction to Natural Selection

Answer the Following Questions:

  • What is the difference between evolution and natural selection?
  • What determines how competitive an organism is?
  • Genetic differences in a population are called ________________. What is their cause?
  • What are adaptations?
  • How do we measure evolutionary fitness?
  • What is heritability?
  • How are the rate and direction of evolution determined?
  • Why are silent male crickets more common on Kauai?
  • STOP the video at 6:54. Describe the change in the sparrow population after the snow storm.

Supplementary Resources:

On the way…


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