Across
- 6. the impression of an organism in a rock
- 8. the preserved evidence of the activity of an organism
- 10. a person who studies plants and animals by observing them
- 12. a chart that divides Earth's history into different time units based on changes in the rocks and fossils
- 14. an adaptation in which one species looks like another species
- 15. a fossil copy of an organism made when a mold of the organism is filled with sediment or mineral deposits
- 16. event that occurs when the last individual organism of a species dies
Down
- 1. an adaptation that enables a species to blend in with its environment
- 2. the process by which organisms with variations that help them survive in the environment live longer, compete better, and reproduce more than those that do not have the variations
- 3. the selection and breeding of organisms for desired traits
- 4. the study of similarities and differences among structures of living species
- 5. the science of the development of embryos from fertilization to birth
- 7. the change over time in populations of related organisms
- 9. record of all the fossils ever discovered on Earth
- 11. an inherited trait that increases an organism's chance of surviving and reproducing in a particular environment
- 13. a slight difference in an inherited trait among individual