Across
- 3. Change over time
- 4. Allows for immunity to a disease
- 5. Same species
- 6. Preserved remains of an organism
- 7. organelle that performs photosynthesis
- 9. creation of a new species
- 11. cell containing no nucleus
- 15. All organisms evolve from each other
- 16. Contain a nucleus and membrane bound organelles
- 17. product of reproduction
- 18. Stops gene flow
- 19. struggle for survival
Down
- 1. Cellular respirationon that doesn't use oxygen
- 2. Species dies out
- 4. Structures that are no longer used by organisms
- 8. Performs cellular respiration
- 10. Some traits are strengthened or weakened
- 12. Variety of living things on Earth
- 13. Both prokaryotes and eukaryotes contain this organelle
- 14. Characteristics of organisms that helps to enhance their chance of survival