Bio. Chapter 4 Review

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Across
  1. 2. a visible or invisible difference in population
  2. 5. characteristics that improve likelihood of survival
  3. 10. reproduce with itself
  4. 11. organism with certain characteristics that increase chance of survival
  5. 12. provides you with characteristics
  6. 16. ancestors would be found in older rocks
  7. 17. Occurs in somatic body cells
  8. 18. observable characteristics
  9. 19. changes in genetic material
Down
  1. 1. coastlines of neighboring continents have similar fossils
  2. 3. variable offspring
  3. 4. less likely to survive due to a trait
  4. 6. "descent with modification"
  5. 7. fill in the "gaps" in the fossil records
  6. 8. agents that cause mutation
  7. 9. Occurs in reproductive cells
  8. 11. formation of new species
  9. 13. the study of the inner workings of an organism
  10. 14. process that helps an organism survive and reproduce
  11. 15. the genetic constitution of a individual organism