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When DNA samples are loaded into a gel and an electric current is applied, the DNA fragments move through the gel. Smaller fragments move faster and farther than larger ones. The pattern of bands (lines) that appears on the gel can be compared across samples to Show more…
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The eating of a marine mollusk containing neurotoxins such as saxitoxin can result in paralytic shellfish poisoning, cholera, polio, diverticuli necrosis syndrome. 10) True or False: In addition to Puffer fish, tetrodotoxin can be associated with frogs and newts? 11) Match the following: - Ichthyosarcotoxic Fish: Contains toxin in the blood. - Ichthyo-otoxic Fish: Contains toxin in their viscera, mucous, skin, or musculature. - Ichthyo-hemotoxic Fish glands: Contains toxin in their glands. 12) Ciguatera disease can originate from eating well-cooked herring, snapper, and grouper. This disease is caused by contamination from red tide water, which is caused by red vibrio virus and the result of dumping military equipment at sea or pumping bilge water by ocean vessels. 13) The eating of tuna can result in Scombroid Fish Poisoning (SFP), characterized by the production of histamine from the decomposition of histidine. The symptoms of SFP are: flushing, burning of the skin, foaming at the mouth, losing hair, and death.
Sri K.
The marine biologists are interested in the economic value of the abalones and would like to investigate several problems. Firstly, they would like to know the values of every single abalone that has been collected. They have provided you with the market standards used to estimate an abalone value: Abalone value = [1 + 1/3 (Length – 0.5) + 1/3 (Diameter – 0.4) + 1/3 (Height – 0.4)] * Whole_weight * $0.5. In addition, if the abalone belongs to Category I, its value will be multiplied by 1.5; if the abalone belongs to Category II, its value will be multiplied by 0.8. Secondly, they would like to know the average value for each gender. Lastly, they would like to know the average value for each water region.
Akash M.
In December 2011, Consumer Reports published their study of labeling of seafood sold in New York, New Jersey, and Connecticut. They purchased 190 pieces of seafood from various kinds of food stores and restaurants in the three states and genetically compared the pieces to standard gene fragments that can identify the species. Laboratory results indicated that 22% of these packages of seafood were mislabeled, incompletely labeled, or misidentified by store or restau- rant employees. a) Construct a 95% confidence interval for the proportion of all seafood packages in those three states that are mislabeled or misidentified. b) Explain what your confidence interval says about sea- food sold in these three states. c) A 2009 report by the Government Accountability Board says that the Food and Drug Administration has spent very little time recently looking for seafood fraud. Suppose an official said, “That’s only190 packages out of the billions of pieces of seafood sold in a year. With the small number tested, I don’t know that one would want to change one’s buying habits.” (An official was quoted similarly in a different but similar context). Is this argument valid? Explain.
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