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Marine Science Review Questions- Chapter 5-The Microbial World Mrs. McCloskey Answer in complete sentences. 1.) Briefly describe the structure of a prokaryotic cell. Include major structures. 2.) How are decay bacteria important to the marine ecosystem? 3.) Cyanobacteria are an important part of the marine environment. Why do they not all appear green? (Be specific, please) 4.) What is the evolutionary significance of cyanobacteria? How do know that they are such an ancient group of organisms? 5.) How are cyanobacteria important in terms of the nitrogen cycle? 6.) Briefly describe the structure of diatoms. Which photosynthetic pigments give diatoms their golden color? 7.) Briefly describe the structure of a dinoflagellate. How is the cell wall different from diatoms? 8.) Dinoflagellates can be harmful. What harmful ocean phenomenon are dinoflagellates responsible for? 9.) What are zooxanthellae and where are they found? What type of relationship do they have with their hosts? (hint: I will ask you about these little guys ALL THE TIME!) 10.) How are protozoans different from algae? 11.) Briefly describe the structure of Foraminerifera. 12.) Briefly describe the structure of Radiolarians. Why do we find more radiolarian ooze in very deep parts of the ocean?