Across
- 6. The organisms in this kingdom have no cell walls, no chloroplasts, and are heterotrophs.
- 8. Anatomical structures in different organisms that are similar in structure, but different in function.
- 16. The domain to which there true bacteria belong.
- 17. The greater the number of _______ structures two organisms share, the more closely related they are thought to be.
- 18. This term refers to the structure of an organism.
- 21. A system of naming that assigns each organism a two part name (2 words).
- 24. This kingdom contains green, photosynthetic plants.
- 25. A method used to identify an organism. It presents users with two choices that will eventually lead to the identification (2 words).
- 27. Kingdom to which the true bacteria belong.
- 28. The original system of classification had only two domains. What third domain was added in the 1990s?
- 32. This kingdom contains bacteria such as strep and staph.
- 35. Visual that uses shared characteristics to show evolutionary relationships.
- 36. This kingdom contains heterotrophic organisms that possess cell walls made of chitin.
- 37. The fifth level of classification.
- 38. The third level of the classification system.
Down
- 1. These structures are reduced in size and seem to be “leftovers” from a previous ancestor.
- 2. This kingdom contains organisms that has both plant-like and animal-like characteristics.
- 3. Domain to which all organisms possessing cells with nuclei and membrane bound organelle belong.
- 4. All scientific names are written in this language.
- 5. The sixth level of the classification system.
- 7. Term meaning that a cell possesses a true nucleus and membrane bound organelles.
- 9. This part of the scientific name is always capitalized.
- 10. The number of levels of classification in the current system.
- 11. The evolutionary history of an organism.
- 12. Swedish naturalist who developed the classification system we use today (last name).
- 13. The broadest level of classification.
- 14. An organism, that is placed at the bottom of a phylogenic tree is the ________ of the organisms placed above it (2 words).
- 15. The scientist who proposed the Theory of Natural Selection (2 words).
- 19. Kingdom to which the very ancient and often extreme bacteria belong.
- 20. A phylum is divided into several ________.
- 22. The process by which organisms that are better adapted to their environment survive and reproduce more successfully than less well adapted individuals (2 words).
- 23. What cellular characteristic is shared by the true bacteria and the archaea bacteria?
- 26. The fourth level of the classification system.
- 29. Currently, scientists are using a classification system that consists of how many domains?
- 30. If two organisms can mate and produce fertile offspring, the are placed in the same ___________.
- 31. This part the scientific name is always written in lowercase letters.
- 33. This kingdom contains mushrooms and molds.
- 34. The branch of biology that classifies organism and assigns each organism a universally accepted name.