Across
- 2. preserved remains
- 7. a system of ideas
- 9. group of species
- 10. a bacterium
- 14. involes measuring amounts of isotopes
- 17. change overtime
- 18. diagram
- 20. factor `that affects natural selection
- 22. first part of a scientific name
- 23. a taxonomic kingdom compromising all living and extinct animals
Down
- 1. study of fossils
- 3. second part of a scientific
- 4. character a trait
- 5. most likely to survive and reproduce
- 6. microorganism that are similar to bacteria in size and structure
- 8. radically different in molecular organization
- 11. age of fossils
- 12. trait that helps an organism survive
- 13. collections of fossils
- 15. the taxonomic kingdom compromising all living and extinct plants
- 16. study of how living and extinct
- 19. a taxonomic kingdom compromising all protist
- 21. a taxonomic kingdom compromising all fungus