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Ocean Acidification - Botany - Exams, Exams of Botany and Agronomy

National Center For Biological SciencesBotany and Agronomy

Ocean Acidification, Fission Products, Radioactive Material, Radioactive Decay, Cycles of Carbon, Nitrogen and Oxygen, Biological Cycles, Primary Productivity, Sargassum Muticum, Reticulate Evolution. This is past exam paper of Botany. You will find it interesting along with other past exam papers in my documents here.

Typology: Exams

2011/2012

Uploaded on 11/24/2012

atreyi
atreyi 🇮🇳

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Semester I Examinations 2009 / 2010
Exam Code(s) 4MR2
Exam(s) 4th B.Sc. Marine Science (Hons)
Module Code(s) MR420/MR401/BT422
Module(s) Advanced Topics Paper 1
Paper No. I
External Examiner(s) Dr Richard Thompson
Internal Examiner(s) *Dr Anne Marie Power and other internal examiners
Instructions: Answer FOUR questions, ONE from each section.
(allow approximately 45 minutes per question)
All questions are equally weighted.
Use a separate answer book for each section.
Duration 3 hours
No. of Pages 2
Department(s) EOS, Botany, Zoology
Requirements None
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Semester I Examinations 2009 / 2010

Exam Code(s) 4MR Exam(s)^4 th (^) B.Sc. Marine Science (Hons) Module Code(s) MR420/MR401/BT Module(s) Advanced Topics Paper 1 Paper No. I External Examiner(s) Dr Richard Thompson Internal Examiner(s) *Dr Anne Marie Power and other internal examiners

Instructions: Answer FOUR questions, ONE from each section.

(allow approximately 45 minutes per question) All questions are equally weighted. Use a separate answer book for each section.

Duration 3 hours

No. of Pages^2 Department(s) EOS, Botany, Zoology Requirements None

SECTION A

  1. Iodine-129 and Caesium-137 are fission products of Uranium-235. Explain the difference between fission of radioactive material and radioactive decay, and discuss the uses and limitations of 129I and 137Cs as tracers of oceanographic processes.
  2. Discuss the close linkages between the cycles of carbon, nitrogen and oxygen in the oceans, explaining how perturbations in one cycle may influence the others. Consider using diagrams to illustrate your discussion.
  3. Explain what is meant by the term 'ocean acidification' and describe how, if atmospheric CO 2 levels continue to rise, acidification may affect chemical and biological cycles in the oceans of the future. SECTION B
  4. Discuss the implications of the underwater light climate for light absorption and utilisation and primary productivity by seaweeds.
  5. Describe seaweed responses to stress. Using labelled diagrams, describe the different stress response phases that may be observed and give examples of metabolic responses to a particular stress of your choice.
  6. Discuss the problem(s) of introduced seaweed species, with particular reference to Sargassum muticum introduced to the North East Atlantic. SECTION C
  7. What are the likely consequences of increased atmospheric CO 2 concentration on coral reefs?
  8. What is reticulate evolution and which aspect of coral reproduction facilitates this phenomenon?
  9. The frequency of Black Band Disease (BBD) in corals has increased significantly in recent decades. Given that the causative agent of BBD is a microbial consortium, would you agree with claims made recently that the increase in BBD is due to human activities? Please explain your opinion. SECTION D
  10. Describe Bioclimate Envelope Models (BEMs) and how they work. Give an example of how BEMs can be applied to assessing extinction risk due to global warming.
  11. How important are a) biotic interactions b) species dispersal and c) adaptation to environmental temperatures, when predicting biogeographic range shifts due to global warming? Please use examples from the literature to back-up your answer.
  12. Write an essay on ‘Stock Assessment’ and how this relates to international fisheries management strategy.