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