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- Which of these statements describes an accurate model for how carbon dioxide and oxygen levels change within the ocean over time? Choose two answers that apply. A) eutrophication of the ocean leads to an increase in dissolved oxygen. B) photosynthesis by the phytoplankton increase the oxygen concentration of the ocean. C) decomposition of dead organic matter decreases the oxygen concentration in the ocean. D) cellular respiration by primary consumers increases the oxygen concentration in the ocean E) anaerobic respiration at the ocean floor decreases the carbon dioxide levels in the oceanImagine you are testing water samples from a local pond for pollutants. Your lab instructor sees the results of your dissolved oxygen test and remarks that your water sample has the same dissolved oxygen level as water found near the seafloor of a dead zone. What is the dissolved oxygen level of this water sample? 650-700 ppm 350-360 ppm 80-90 ppm 7-9 ppm 2-3 ppm10) The graph describes the relative rates of metabolism that occur at different depths in a lake. I. Evaluate the figure and indicate whether the letters A and D represent only the respiration rate of the organisms. A) TrueB) false II. Evaluate the figure in indicate what the productivity observed at 10 meters is due to. A) Excess nutrients on the surface.B) High temperatures.C) The turbinez of the water at 10 meters.D) The availability of the Light. III. Part of the energy that is not transferred to subsequent trophic levels is used by organisms for their vital processes. What happens to the remaining energy? A) is used in reproduction.B) It is removed as heat.C) It is stored as a reserve of nutrients.D) It is stored as body tissue.
- 1) Identify the air pollutant you have chosen. a) What is the chemical composition of that pollutant? b) Is this air pollutant a primary or secondary pollutant? 2) Describe what is the primary source/cause of this air pollutant. Where does this air pollutant typically occur, i.e. does it occur in a specific geographic area or part of the atmosphere, or is it widespread? 3) Describe what effects do (or potentially do) this air pollutant have on the environment? Distinguish between a) physical effects on the environment/ecosystems and b) effects on living organisms. 4) Describe (be specific for each) what is being done to control this pollutant from the standpoint of a) laws/provisions of the Clean Air Act (or other laws) b) actual efforts to control its emissions.Answer these questions A) State effects of acid rain B) What are the effects of primary and secondary pollutants? C) What are the factors that increase the primary and secondary pollutants? C) State natural sources of primary pollutants?Which among A-D is not a step in the eutrophication process? A) O rapid growth of algae and cyanobacteria B) O influx of excess nutrients to an aquatic environment, particularly nitrogen and phosphorous C) O heterotrophic, aerobic respiration D) O eventual increase in the numbers of fish and other aquatic life due to the rise m oxygen concentration of the water E) OA-D are all a part of eutrophication
- The term BOD (Biological Oxygen Demand): Group of answer choices is a measure of the organic matter and other oxygen-demanding wastes in a)a lake or stream. b)is the highest after a person eats a candy bar c)is defined as the amount of oxygen needed by fish to survive. d)is defined as the number of organisms that need oxygen in a stream. NextIn your travels around the Chesapeake Bay region, you have noticed that pink comb jellies (Beroe ovata) do not seem to be distributed evenly throughout the Bay. You suspect that this is because of environmental factors such as salinity, temperature, or the amount of oxygen dissolved in the water. You decide to pick one of these to test. Research question: Does salinity affect the distribution of pink comb jellies (Beroe ovata) in the Chesapeake Bay? After doing a little research in the literature, you discover that a common jellyfish (Aurelia aurita) prefers to live in higher salinity waters. (Comb jellies and jellyfish are not closely related, but since they are similar in structure, you hypothesize that they will react similarly to changes in salinity. a) Use this data, and sketch a graph by hand that would best fit the data. (think which type of graph would allow standard deviation to be included) b) Write an appropriate caption for your graph.Explain how streams can cleanse themselves andhow these cleansing processes can be overwhelmed.What is wastewater? Describe the state of streampollution in more- and less-developed countries.Give two reasons why lakes cannot cleanse themselves as readily as streams can. Distinguish betweeneutrophication and cultural eutrophication. Listways to prevent or reduce cultural eutrophication.Explain why groundwater cannot cleanse itself verywell. What are the major sources of groundwatercontamination in the United States? List ways to prevent or clean up groundwater contamination. Listsome ways to purify drinking water. Describe the environmental problems caused by the widespread useof bottled water.
- Explain why seasonal stratification of temperature and oxygen takes place in deep ponds and lakes.Father's Genes Hemophilia is a sex-linked, recessive trait. Which of the following describes the probability of hemophilia in the offspring of a man who does not have hemophilia and a woman who is a heterozygous carrier? You may use a Punnett Square like the one below to find your answer There is a 0% chance that their daughters will have hemophilia O There is a 50% chance that their daughters will have hemophilia There is a 25% chance that their sons will have hemophilia There is a 100% chance that their sons will have hemophilia O o oThe graphs show how the cloudiness of the water at two different sites varied over a period of one year. Site A had a low nitrate concentration. Site B had a high nitrate concentration. (i) Describe and explain the effect of increased nitrate concentration on algal growth. (ii) Algae do not live long. Explain why the presence of large numbers of algae results in a fall in the amount of oxygen dissolved in the water. (iii) There are very few submerged water plants at Site B. Use (iii) the graphs to suggest how placing a speed limit on boats might allow submerged water plants to become re-established at Site B.