Across
- 3. Any change in the DNA of a gene or a chromosome
- 4. allele An allele that is hidden whenever the dominant allele is present
- 9. Change over time
- 10. selection The process where humans breed only organisms with desired traits
- 11. record All the fossils that have been discovered and what scientists have learned from them
- 13. An inherited behavior or physical characteristic that helps an organism survive and reproduce in its environment
Down
- 1. An organism's physical appearance, or visible traits
- 2. The struggle between organisms to survive as they attempt to use the same limited resources in the same place at the same time
- 5. Any difference between individuals of the same species
- 6. selection The process by which organisms that are best adapted to their environment are most likely to survive and reproduce
- 7. The passing of traits from parents to offspring
- 8. The preserved remains or traces of an organism that lived in the past
- 12. theory A well-tested explanation for a wide range of observations or experimental results