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BI 411 Ch. 13

QuestionAnswer
Give the names for the two body types in the cnidaria polyp and medusae
Give the genus for the moon jellyfish? Aurelia
Name five classes of cnidaria 1.Hydrozoa 2.Scyphozoa 3.Cubozoa 4.Anthozoa 5.Staurozoa
List 3 things that help in the maintenance of a healthy coral reef. 1.Good Current/wave action 2.Few nutrients/no competition with algae 3.Balanced Biological Community
List the requirements of the reef building corals. 1.Stable, warm temperature, 60 - 85 degrees F 2.Salinity of undiluted sea water, 3.5 % salt, or 35 parts per thousand 3.Low turbidity/clear water
What are the limitations of the reef building corals? 1.30 degrees N, 30 degrees S latitudes 2.no cold water 3.high turbidity 4.low salinity
What are some problems with the Florida Keys Coral Reefs? 1.Coral Bleaching - warm / hot temperatures in summer and not enough rain or wave action can cause death to the corals 2.Damage may be caused by: Hurricanes or Human intervention
List 4 pollutants may threaten coral reefs. 1.Plant Nutrients 2.Toxic 3.Chemicals - sewage, minerals from agriculture and industry 3.Sediments from dredging and erosion 4.Petroleum from ships and storm sewers
Why is the Portuguese man-of-war dangerous to man? It is larger than most species of its kind. The neurotoxins are also more powerful. It is also able to still sting when presumed dead.
Where in Alabama would you expect to find comb jellies? Down at the beaches of the gulf. Dauphin island is the best.
What are some characteristics of the Ctenophora? extracellular digestion, monoecious, no respiratory system, no coelomic cavity, colloblasts, 8 rows of combs, biradial symmetry, entirely marine, no definite head.
What are the two methods of reproduction that occur within coral reefs? Spawning and budding
When does spawning occur for coral reefs? It occurs eight days after the first full moon in August every year
What are the two ways the coral get their food? plankton and mutualistic symbiotic zooxanthellae
Coral reefs get about 20 % of their diet from what? plankton
Coral reefs get about 80 % of their diet from what? mutualistic symbiotic zooxanthellae
What is meant by an alternation of generations in Obelia? It is an alteration of body types as it develops which includes both polyp and medusae.
Created by: gmoore730
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