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What are the two paths that dissolved phosphates can take in aquatic ecosystems?
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- What result can a lake give which is rich in organic waste?Why is release of sulfide from oxygen minimumzones infrequent, occurring at times of exceptionallyhigh surface water productivity?Imagine 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 ppm
- How does ocean acidification impact marine ecosystems?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. NextAccording to the Berner Classification for aqueous environments, which of the following definitions describes the Postoxic stage? O a. Dissolved Oxygen 1mM of Sulfide Species O c. Dissolved Oxygen 0.5% of Saturation (~1 mM) Plants can assist in geochemical metal exploration, because: O a. they carry mineral grains to the surface O b. none of the other options O c. they produce gases that can be analysed between their roots O d. they transport dissolved metals to the surface through their roots