Across
- 3. a genetically determined characteristic
- 5. structure anatomy that is similar in structure but differ in function bat wings alligator forelimbs human arms penguin wings
- 6. to genes or heredity
- 9. the permanent loss of a population or species called
- 10. a remarkable thing that occurs without the cause of human kind
Down
- 1. structure an anatomical feature or behavior that no longer seems to have a purpose in the current form of an organism
- 2. the biological change of a species over a span of time
- 4. all the inhabitants of a particular town, area, or country.
- 7. small incremental changes accumulating over time
- 8. quality or characteristic genetically from one's parents or ancestors.