Across
- 1. process by which humans modify a species by breeding it for certain traits
- 3. said environmental change caused an organism to change their behavior
- 9. thought less complex species change to more complex species
- 11. examples include the wing of a bird and the wing of an insect
- 12. differences in physical traits of an individual from the group to which it belongs
- 14. had the idea that species shared common ancestors
- 17. created a classification system for all types of organisms
- 19. examples include the wing of an ostrich and the appendix of a human
- 20. change in a species over time, change by which descendants come to differ from their ancestors
Down
- 2. observed species with different adaptations depending on their environment
- 4. all of the individuals of a species that live in the same area
- 5. trace of an organism from the past
- 6. inherited trait that is selected for over time because it allows organisms to better survive in their environment
- 7. group of organisms so similar to one another that they can breed and produce fertile offspring
- 8. examples include the wing of a bat and the hand of a human
- 10. body part that is similar in structure on different organisms but performs different functions
- 13. mechanism by which individuals that have inherited beneficial adaptations produce more offspring on average than do other individuals
- 15. body part that is similar in function as a body part of another organism but is structurally different
- 16. remnants of an organ or structure that functioned in an earlier ancestor
- 18. measure of an organism's ability to survive and produce offspring relative to other members of a population