Across
- 3. A group of living organisms consisting of similar individuals capable of interbreeding to produce fertile offspring
- 10. The study of embryos and their development
- 11. Process of forming a fossil from a living organism
- 12. To change over time to better suit the environmental pressures
- 14. A subdivision of periods
- 15. Preserved remains or impression of an organism that is no longer extant
- 16. Layers of sediment are compressed and glued together by chemical reactions and pressure
Down
- 1. Time taken for half the radioactive atoms in the substance to decay
- 2. When one ancestral species evolves into one or more new species
- 4. All members of a clade including common ancestor can be shown in a diagram called
- 5. Evolutionary history
- 6. Comparing structures of two different species
- 7. Layers of sedimentary rocks form in layers called
- 8. Change in heritable characters of a population or species over time
- 9. The study of where in the world plants and animals live
- 13. Estimating the age of rocks or fossils in millions of years