Across
- 1. Layers of sediment compressed and glued together by chemical reactions and pressure in sedimentary rock.
- 3. Defined as a group of genetically similar organisms that can potentially interbreed to produce viable offspring.
- 6. A diagram that displays each branch showing a new group or species that have evolved from the ancestral species and the order in which they have evolved.
- 7. Comparing different animals at different stage of development.
- 9. The one of the different chunks in the geological time scale.
- 11. The process of forming a fossil from a living organism. The following steps are the main stages involved in the process.
- 14. Estimating the age of rocks or fossils in (millions of) years is called absolute dating.
- 15. Evolution that occurs when a new species evolves from an existing species. The new species has different characteristics than the ancestral species.
- 16. The evolutionary history of a species.
Down
- 2. The preserved impressions of an organism.
- 4. Radioisotopes decaying to stable atoms at a known rate.
- 5. The rock where fossils are normally found in.
- 8. The structural morphology of an organism refers to its physical structure, or the way it was 'built'. Comparing structures of two different species.
- 10. The characteristics that are selected for, are determined by the specific selective pressures of the environment.
- 12. The study of where in the world plants and animals live.
- 13. The change in heritable characters of a population or species over time.