B67

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Across
  1. 3. Process favoring traits that improve survival
  2. 5. Formation of a new species
  3. 6. Ability to survive and reproduce
  4. 10. Environmental factor affecting survival
  5. 12. Change in species over time
  6. 13. Collection of fossils showing life history
  7. 14. Group of one species in an area
  8. 15. Differences among individuals in a population
Down
  1. 1. Change in genetic material
  2. 2. Organisms capable of producing fertile offspring
  3. 4. Trait that helps an organism survive
  4. 7. Production of offspring
  5. 8. Preserved remains of ancient life
  6. 9. Continued existence of an organism
  7. 11. Disappearance of a species