Across
- 2. occurs when the last individual organism of a species dies
- 5. the science of the development of embryos from fertilization to birth
- 6. resemblance of one species to another species
- 8. fossil copy of an organism in a rock
- 9. selection, variations of organisms to help them live longer, compete better, and reproduce more
- 10. a person who studies plants and animals by observing them
- 11. time scale, a chart that divides Earth's history into different time units
- 13. structures, body parts that have lost their original function through evolution
- 15. record, made up of all the fossils ever discovered on Earth
- 16. fossil, the preserved evidence of the activity of an organism
- 18. slight difference in an inherited trait of individual members of a species
Down
- 1. is an adaptation that enables a species to blend in with its environment
- 3. evolution, the change over time in populations of related organisms
- 4. anatomy, study of similar & differences among structures of living species
- 6. impression of an organism in a rock is called
- 7. structures, body parts that perform similar function but differ in structure
- 12. an inherited trait that increases an organisms chance of surviving and reproducing
- 14. breeding, breeding organisms for desired characteristics
- 17. structures, body parts of organisms that are similar in structure but not in function