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- List three ways that organisms serve as important means of chemical transport within or between ecosystems. Describe a specific one of themMention any two ways in which organisms tide over unfavourable conditions by suspending their activities.With reference to the phosphorus cycle, explain the benefits of phosphate solubilizing microorganisms to plants and Discuss how the activities of symbionts in a mutualistic association can lead to microbial weathering (1000 words).
- Could there be any advantage for a Phytoplankton cell to not minimize the sinking rate? Explain.Every type of organism in the upper ocean contributes to both recycling of organic matter and sinking of organic matter. Briefly describe 2 interactions between organisms that result in both the recycling and sinking of organic matter. a) Interaction 1: - Brief description of how this interaction results in both the recycling of organic matter in the upper ocean and the sinking of organic matter: b) Interaction 2: - Brief description of how this interaction results in both the recycling of organic matter in the upper ocean and the sinking of organic matter:.Design an experiment to solve the following problem:Determine the rate of methanogenesis (CO2 + 4H2 S CH4 +2H2O) in anoxic lake sediments and whether or not itis H2-limited.
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- List some metabolic strategies that have evolved to enable microbial survival in oligotrophic marine habitats. Which do you think is most successful in terms of numbers of microbes and metabolic flexibility? Explain your answerThe deep scattering layer is created by which of these: a) seasonal changes in the thermocline O b) mesopelagic nekton O c) abyssopelagic plankton O d) phytoplankton bloomsWhich of the following statements DOES NOT describe microbes in an aquatic system? A. Bacterial and archaeal species are equally represented in freshwater and marine. B. Contains a large number of viruses. C. Converts dissolved organic carbon to utilizable forms of higher trophic level organisms. D. Possess several anti-predation mechanisms.