Across
- 3. A trait that helps an organism to survive in their environment.
- 4. Changes to DNA. Ex: Rock pocket mice changing color
- 5. Movement of alleles from one place to another
- 7. A giraffe with a long neck will have higher ________ than one with a short neck when eating leaves from tall plants
- 9. Pieces of evidence based on past organisms
- 11. Transmissions of gene in small populations
- 12. Structures similar in shape and size but different uses
- 13. _________ isolation is when species are separated by a physical barrier
- 14. ____________ isolation: birds sing and dance to impress the females
Down
- 1. Favors traits that are on the extreme
- 2. Natural selection acts on the __________ of an organism
- 3. Structures such as a bird wing and a butterfly wing
- 6. Favors one of the extreme traits
- 8. Natural ________ the mechanism in which individuals that are better adapted to their environment reproduce and survive more
- 10. Favors the average traits