Across
- 1. The offspring of two plants or animals of different species or varieties, such as a mule.
- 2. the branch of biology and medicine concerned with the study of embryos and their development.
- 6. Change of an organim over time
- 8. The quality of being suitable to fulfill a particular environment.
- 9. Similar structures due to the same selective pressure to adapt to similar environments.
- 11. The study of heredity and the variation of inherited characteristics.
- 12. The remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.
Down
- 1. Shared physical featuresdue to to a shared common ancestor.
- 3. evolution that happens to a population of a species
- 4. A change or the process of change by which an organism or species becomes better suited to its environment.
- 5. The branch of biology that deals with the geographical distribution of plants and animals.
- 7. differential survival of organims due to different structures.
- 10. Large-scale changes that occur over extended periods of time.