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Across 2. A compacted strand of RNA that infects organisms. 6. When a pathogen successfully invades and multiplies within a host. 8. Structures that release spores that are made by bacteria. 10. An epidemic that spreads over a large area, encompassing multiple countries. 12. Archaebacterium that lives in surprisingly hot habitats. 14. A prokaryotic domain/kingdome that includes methanogens, halophiles, and thermophiles. 16. A gene transfer mode for Prokaryotic cells. 18. A deadly new pathogen. 20. A prokaryotic cell shaped like a sphere. 21. An infectious, disease-causing microorganism that multiplies rapildly within its host. 22. A prokaryotic cell whose shape has twists in it. 23. A flagellum on a bacteria that differs from eukaryotic flagella in that it rotates like a propeller. 24. When viral DNA is integrated with host DNA and can be innactivated for a while but eventually replicated. 26. Rapid reproduction of viruses that concludes with lysis of the virus' host cell. 32. An organism too small to be seen without a microscope. 33. A single cell organism that lacks membrane-bound organelles and includes archaebacterium and eubacterium. 34. A type of virus that targets bacteria cells. 35. A prokaryotic cell that is rod-shaped. 36. When a sample of cells is stained to see whether they are gram-positive or negative.

Down 1. An anaroebic arcaebacterium that produces methane. 3. When a pathogen disrupts bodily function due to the immune system not being activated soon enough. 4. A small, infectious protein that attacks the nervous system. 5. Damage to the cell membrane, wall, or both, which releases cytoplasm and kills the cell. 7. A quick spread of and retreat of a disease in an area. 9. A double-stranded DNA molecule with a few proteins and is circularized. 11. Archaebacterium that lives in strangely salty habitats. 13. A structure that includes some cytoplasm and duplicate of the cell's chromosome formed by some bacteria. 15. A cyanobacterial cell that makes a nitrogen-fixing enzyme when there is a lack of nitrogen. 17. A comparison of traits used to find the degree of relatedness of an unidentified organism and a known group. 19. A type of cell division specific to prokaryotic cells. 25. A circular, seperated strand of DNA that is replicated seperately of the chromosome. 27. A capsule that forms a layer around a bacterial cell wall and is made of a sticky mesh. 28. A prokaryotic cell that has a nucleoid. 29. A certain type of organism that is too closely related the type which it is compared to to be considered seperate species. 30. An infectious agent that is non-living and is replicated through gene transfer into its host. 31. A rigid plate that provides structure and support its cell. 33. A short protein, shorter than a flagellum, that helps a cell stick to surfaces.