Across
- 4. seasonal movement of species from one region to another
- 7. gradual change in species overtime
- 9. preserved remains of traces of an organism that lived in the past
- 10. last shared _____________ on the branching tree of revolution
- 13. how strong a organism can survive and reproduce in its environment
- 14. controls a trait and a segment of a DNA strand
- 15. being populated with an excessive large number
Down
- 1. a trait that helps one survive and reproduce
- 2. differences between the same species
- 3. when individuals adapt to their environment and most likely to survive and reproduce
- 5. babies
- 6. there are no more of that species
- 8. a group of similar organisms that mate with each other and produce fertile offspring
- 11. change of a material in a cell
- 12. the theory of evolution working slowly