Across
- 1. selection that results in 2 traits
- 3. used to show relationships between species
- 5. shows traits of 2 different species
- 6. event where 2 species form
- 8. a survival mutation in bacteria
- 12. event where over 1/2 species die
- 13. selection that results in new trait
- 14. drug that kills bacteria
- 15. survival of the fittest
- 16. ability to reproduce and pass genes on
- 17. using isotopes to date fossils
- 18. similar anatomy in different species
- 19. organisms who can reproduce fertile offspring
Down
- 2. selection that increases trait
- 4. time for 1/2 the amt of isotope to decay
- 7. humans control breeding
- 9. a survival mutation in insects
- 10. change in allele frequency in a population/time
- 11. parent ___ turn into daughter __ as these decay