Natural Selection

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Across
  1. 5. organisms with the best traits live longer and pass traits to offspring
  2. 6. traits that can be passed from one generation to next
  3. 7. the process of biological change by which descendants come to differ genetically from their ancestors
  4. 8. large scale evolution affecting changes in species across populations
Down
  1. 1. measure of how well an organism can survive in its environment
  2. 2. evolution ocurring on a small scale; affects single populaion
  3. 3. inherited characteristic that increases on organism's chances of survival
  4. 4. differences in the physical traits of organisms