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- MATCHING: select the choice that best represents the statement. A. diatoms 18. Which algae form reproduces by conjunction? 19. Chlorophyta is another name for which colored algae? 20. Is Fucus rock weed fresh water or marine? В. spyrogyra C. green D. marine 21. Golden algae form a variety of shapes and sizes known also as what common name? E. heterocytes F. fresh water 22. Nostoc, of the blue-green algae family, have a central larger cell that interrupts the chain. Name it? G. golden brown H. redDescribe the importance of dinoflagellates in marine ecosystems and the situation which can arise in marine ecosystems when certain dinoflagellates species reproduce rapidly.With which of the following is a dinoflagellate associated?(a) Most usually have flagella and can carry out photosyn-thesis.(b) Some produce toxins that accumulate in the bodies ofshellfish.(c) Blooms of dinoflagellates are known as the ‘‘red tide.’’(d) Inhalation of air that contains small quantities of dino-flagellate toxin can cause respiratory membrane irrita-tion in sensitive individuals.(e) All of the above are characteristics associated withdinoflagellates.
- Dinoflagellates and provide nutrients from the products of photosynthesis to the corals in exchange for a safe place to live, the best description of this symbiotic relationship is A. mutualistic B. parasitic C. commensaltrue/false 1. Siphonaptera has a laterally flattened body. 2. Sawflies have crochets on their prolegs. 3. Spruce Beetle (Dendroctonus rufipennis) is generally attracted to weakened or recently dead trees, and carries blue stain fungi. 4. Geometridae larvae have only 2 or 3 pairs of prolegs.Discuss the phrase “Sponges work well with so little.” In what particular instance would this be applicable in the life of a sponge? Cite specific examples ( 3) and explain briefly. Discuss the potential use of sponges as monitors of chemical pollutant stress in marine and freshwater ecosystems. Use concepts learned in Ecology. Most sponge species are of leuconoid construction, is this type of sponge construction an advantage or disadvantage?
- 4) There are several other animal models that display regenerative properties including the zebrafish, salamander, and hydra. What specific strengths do planarians offer that makes studying regeneration feasible? 5) Discuss any one conceptual problem that can be addressed by studying regeneration in planaria. The discussion should include what is the problem and how does planaria help in studying the problem? I 6) What is a blastema? Where is it formed and how does it appear?Explain how water temperature and its associations with zooxanthellae help coral of the subclass Hexacorallia precipitate calcium carbonate. Calcium carbonate dissolves in lower pHs, how can zooxanthellae help raise the pH to 8? Are these corals hermatypic or ahermatypic? (C. RHODOPHYTA (Red Algae) a. Gracilaria Porphyra Give a brief description of each diagram. Gracilaria Porphyra