Across
- 3. a homology that shows similarity in molecular structures between different organisms, indicating that they share a common ancestry
- 5. a form of selection where both extremes on the bell curve have high fitness
- 9. Preserved remains or traces of ancient organisms
- 10. a form of selection where the middle adaptation has the highest fitness
- 11. similar in structure despite potentially having different functions, and serve as evidence of descent from a common ancestor
Down
- 1. a biological theory that explains how species change over time and adapt to their environments
- 2. a form of selection where one extreme on the bell curve has the highest fitness
- 4. how species evolved in specific regions over time due to continental drift and isolation
- 6. structure in an organism that has lost most or all of its original function through evolution
- 7. any heritable trait that helps an organism, such as a plant or animal, survive and reproduce in its environment
- 8. structure found in different species that perform a similar function but have different evolutionary origins