Across
- 5. The preserved remains or traces of an ancient organism that provide evidence for evolution.
- 7. A heritable trait that increases an organism's ability to survive and reproduce.
- 8. A specific characteristic of an individual organism, such as eye color or beak shape.
- 9. The process by which certain traits become more or less common in a population (e.g., natural or artificial).
- 10. How well an organism can survive and reproduce in its specific environment.
Down
- 1. A random change in genetic material that serves as the ultimate source of new alleles.
- 2. A group of similar organisms that can breed and produce fertile offspring.
- 3. The process by which organisms change over time from common ancestors.
- 4. Any difference between individuals of the same species.
- 6. The last name of the naturalist who formulated the theory of evolution by means of natural selection.