Marine Microbes Crossword Puzzle

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Across
  1. 1. Eukaryotic multicellular organism that is heterotrophic with cell walls made of chitin
  2. 3. A very debatable class of microorganisms. Reproduces through infections, causes most diseases.
  3. 4. Eukaryotic, unicellular organisms, some of which can red tides.
  4. 5. Protozoans with hair-like cilia for locomotion and feeding
  5. 7. Smallest and oldest of all true living organisms
  6. 9. Domain of the most primitive life forms found in extreme environments
  7. 14. Unicellular organisms encased in glassy silica cell walls
  8. 15. Photosynthetic microorganisms that is important for O2 production
  9. 17. Planktonic marine protozoans with spherical glass skeletons and thin pseudopodia
  10. 19. Organisms that derive energy through consumption of organic matter, most of which are decomposers
  11. 20. Process by which planktonic 13 convert gaseous Nitrogen (N2)to Ammonium (NH4+1), then transformed into Nitrates (NO-1) that is used by primary producers as a nitrogen source for essential proteins
Down
  1. 2. Mostly aquatic and photosynthetic organisms that are not plants, but protists despite being plant-like
  2. 6. The most abundant form of marine life residing in all three domains with important roles like 2 and 3
  3. 8. Massive calcareous mounds formed as a byproduct of number 13
  4. 10. Benthic marine protozoans with calcium carbonate shells and long, thin pseudopodia
  5. 11. The chemical processes within a marine organism’s body that provide energy for vital functions required for living
  6. 12. Symbiotic marine fungi, Cyanobacteria + fungus = ?
  7. 13. Prokaryotic unicellular organisms helps with decay
  8. 16. Structurally simple, eukaryotic organisms that are generally considered protists.
  9. 18. Organisms that derive energy by making their own organic compounds, such as chemical compounds or light