Across
- 3. A reaction to a stimulus.
- 4. The man-made process of selecting a few organisms with desired traits to serve as parents of the next generation.
- 5. Any difference between individuals of the same species.
- 10. Anything outside the body of the organism that can cause a response in an organism
- 11. when a species that no longer has any known living individuals.
- 12. Offspring of crosses between parents with different traits
- 13. A change from within an organism, such as hunger and thirst, that causes the organism to respond
- 14. A change in a species over time
- 15. A change in a gene or chromosome.
- 16. A physical feature that helps an organism survive in it's environment
Down
- 1. Changes in genetic traits over many generations based on organism's ability to survive and reproduce.
- 2. an inherited behavior that helps an organism survive
- 6. Those species that have been brought under human control and that have adapted to life with humans
- 7. Any structure, such as a leg or an antenna, that grows out of an animals body
- 8. A change in an organism's surroundings that causes the organism to react
- 9. a key for the identification of organisms based on a series of choices between alternative characters