Across
- 2. preserved remains of an organism
- 4. the time taken for the radioactivity of a specified isotope to fall to half its original value.
- 6. the stock of different genes in an interbreeding population.
- 7. determines the age of one object or event in relation to the position of the other
- 8. squirrels use this type of camouflage
- 9. an organism's ability to survive and reproduce in a particular environment.
- 12. one extreme trait is more advantageous than all other traits
- 13. a shared body trait that implies common ancestry
Down
- 1. intermediate traits have higher fitness than extreme traitts
- 3. better suited animals survive in their habitat
- 5. advantageous adjustment to an organisms environment
- 10. the creation of a new species
- 11. change over time
- 14. Dinosaurs no longer exist which means they are...