Hilary Kennedy Practice questions

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1. What happens to MOST of the biologically produced particulate matter that is produced in the upper, sunlit part of the ocean?

  • Most biological material is recycled in the surface waters
  • Most of the biological material reaches the sediments
  • Most biological material sinks through the water column and accumulates in the sediments below.
  • Most biological material sinks through the water column and is decomposed and recycled in the deep water column below 1000m
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Other questions in this quiz

2. On average, what is the C:N ratio of phytoplankton?

  • 0.16
  • 6.6
  • 106
  • 6

3. using the stoichiometric equation for respiration. In samples taken at different depths from below the euphotic zone, nitrate concentrations increase by 9.6M. Over the same depth, by how much would you predict the phosphate concentration to change ?

  • 0.6 microM
  • 128 microM
  • 8 microM
  • 5 microM

4. If the regression equation, that represents how much absorption increases with increasing concentration (M) is calculated to be y=0.4x-0.01. What is the concentration of a solution with an absorbance of 0.79?

  • 2 microM
  • 0.306 microM
  • 1.845 microM
  • 195 microM

5. What is the average oceanic mixing time?

  • 5000 years
  • 500 years
  • 50 years
  • 1,500 years

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