Topic #5

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Across
  1. 2. There are not resources available
  2. 4. Evolution occurs at the rate of environmental change
  3. 6. Shows which organisms are related
  4. 8. Insecticide used from 1940-1980's
  5. 12. Every species produces more offspring then the environment can support
  6. 13. A measure of a traits value to survival
  7. 14. Collection of fossils organized in order of age
  8. 18. Those that survive reproduce
  9. 19. Preserves the soft tissue
  10. 22. Source of variation
  11. 23. When a species is not able to adapt to changes in the environment
  12. 24. Trace of an organism that lived in the past
  13. 25. Comparing how organisms carry out their metabolism
  14. 27. and example of Gene Expression based on the environment
  15. 28. Comparing how organisms develop
Down
  1. 1. Structures that were functional in an ancestor but are no longer functional
  2. 3. Body structures that are similar and point to evolutionary relationships
  3. 5. Type of rock where fossils are found
  4. 7. Lack Variation in their population
  5. 9. A is older then B
  6. 10. Comparing how organisms fight of diseases
  7. 11. Those that are best suited survive
  8. 15. Source of variation
  9. 16. Coded for in DNA and can be passed on
  10. 17. Bacteria are becoming less an less effective
  11. 20. Best explanation....
  12. 21. No two individuals are the same
  13. 26. Explanation of how and why life has changed in earth