Across
- 4. 250,000 fit into size of a period in your book
- 9. two flagella and lack skeleton
- 10. viruses that infect and destroy bacteria (two words)
- 11. star shaped internal skeleton made of silica
- 12. infect cells
- 14. massive calcareous mounds formed by cyanobacteria
- 16. used for cleaning swimming pools
- 17. responsible for many deadly human diseases
- 19. found in extreme environments
- 20. breaks down detritus as primary food source
Down
- 1. some carry out nitrogen fixation (two words)
- 2. known as blue-green algae
- 3. responsible for bioluminescent waves
- 5. spherical bacteria
- 6. considered protists with unicellular algae and multicellular seaweeds
- 7. dinoflagellates and planktonic forms of cyanobacteria produce this (two words)
- 8. protozoans with hair like cilia
- 13. smallest of true living organisms and oldest forms of life
- 15. spherical skeletons with radiating spines
- 18. rod shaped bacteria