Invertebrate Zoology Terminology

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Across
  1. 1. When a taxon contains an ancestor but not all descendants
  2. 6. A shared ancestral trait
  3. 12. Traits in multiple species from the same ancestor
  4. 13. The base/ancestor of a phylogenetic tree
  5. 15. Another word for analogous traits
  6. 16. A taxon that consists of all descendants of a common ancestor
  7. 17. Branch of biology that reconstructs the evolutionary history of species
  8. 18. Branch points of a phylogenetic tree
Down
  1. 2. Branch of classification
  2. 3. When a taxon contains an ancestor and all descendants
  3. 4. A unique derived trait
  4. 5. Any group of designated species on a phylogenetic tree
  5. 7. A shared derived trait
  6. 8. Study of organism's relations to understand the history of life
  7. 9. A derived trait
  8. 10. Evolution type that involves independently evolved traits that did not come from the same ancestor
  9. 11. When a taxon contains descendants but not a common ancestor
  10. 14. Principle that looks for the simplest explanation
  11. 17. Study of the evolutionary history of species