Across
- 4. Evidence-the study of the early stages of development in a zygote/developing embryo
- 6. Fertilized egg, embryo of a new developing organism
- 9. Evidence-random neutral mutations accumulate in the genome of a species and can be used to determine how long ago an evolutionary split between species occures
- 10. Section of the evolutionary tree that shows derived characters and ancestral/evolutionary groups of organisms
- 12. Pattern-a small group diversifies into new species or distinct forms
- 13. Scientific classification that organizes living things into related categories
- 14. Pattern-When 2 species that closely interact evolve in response to each other together over time
- 19. Evidence/Pattern-When unrelated organisms evolve to look similar because of environmental demands
- 20. Evidence-unused structures or organs in an organism that are remnants of ancestral species
- 21. Newly adapted characteristics, used to separate species on a cladogram
Down
- 1. Pattern-long periods of genetic equilibrium interrupted by periods of rapid change
- 2. Survival of the fittest-those organisms best suited to their environment survive and reproduce-proposed by Charles Darwin
- 3. Large scale change in species, formation of new species, or change over long periods of time
- 5. 2 part scientific naming system used to identify organisms
- 7. Pattern-when a species is no longer present on Earth
- 8. Evidence-master control genes that determine placement of limbs/organs and development in organisms
- 11. Evidence-When different structures are used for different proposes in different organisms
- 15. Evidence-when the same structures between species are used in different ways
- 16. Theory that explains how the first eukaryotic cells came from a symbiotic relationship between cooperating prokaryotic cells
- 17. Small scale change in allele frequencies in a population
- 18. Evidence-collection of fossilized remains that show changes in organisms through geologic time