Across
- 3. the diminishing of a conditioned response; occurs in classical conditioning when an unconditioned stimulus (US) does not follow a conditioned stimulus (CS); occurs in operant conditioning when a response is no longer reinforced.
- 6. selection Selection by humans for breeding of useful traits from the natural variation among different organisms
- 8. scale used by paleontologists to represent evolutionary time
- 10. Change over time
Down
- 1. A change in a gene or chromosome.
- 2. Chronological collection of life's remains in sedimentary rock layers
- 4. Any difference between individuals of the same species.
- 5. selection A natural process resulting in the evolution of organisms best adapted to the environment.
- 7. inherited characteristic that increases an organism's chance of survival
- 9. A trace of an ancient organism that has been preserved in rock.