Across
- 3. eon in Earth's history with first eukaryotes
- 4. oldest domain of life
- 8. invertebrate/vertebrate clade with "mouth-second" development
- 12. earliest eon in Earth's history, molten planet
- 15. ____ phyla,5 most ancestral clades, independent origins likely
- 17. Margulis theory for origin of mitochondria/chloroplasts
- 18. most closely related kingdom to Animalia
- 19. kingdom of the land plants
- 20. current Eon in Earth's history, Cambrian start
Down
- 1. single-celled eukaryote, generally speaking
- 2. gene transfer between individuals of different lineages
- 5. extremophile prokaryotic domain, sister to Eukarya
- 6. invertebrate clade with "mouth-first" embryological development
- 7. eon in Earth's history with first prokaryotes
- 9. domain of life with membrane-bound nucleus and organelles
- 10. protostome lineage with molluscs and annelids
- 11. period of major adaptive radiation of animals, 538-485mya
- 13. protostome lineage of the arthropods, all shed a cuticle
- 14. gene transfer from parent to offspring
- 16. multicellular heterotrophic kingdom, choanoflagellate ancestors