Chapter 30 Microorganisms in Marine and Freshwater Ecosystems

Chapter 30 Microorganisms in Marine and Freshwater Ecosystems

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

Multiple Choice Questions

1. Which of the following statements concerning the microbial loop is not true?
   A.Microbes consume dissolved organic matter.
2. Marine viruses contribute to the production of dissolved organic matter.
3. Microbes constitute particulate organic matter for zooplankton consumption.
4. All of the choices are correct.

ASM Objective: 05.01 Microorganisms are ubiquitous and live in diverse and dynamic ecosystems.
ASM Objective: 06.01 Microbes are essential for life as we know it and the processes that support life (e.g. in biogeochemical cycles and plant and / or animal microbiota).
ASM Topic: Module 05 Microbial Systems
Blooms Level: 2. Understand
Learning Outcome: 30.02.05 Illustrate the microbial loop and evaluate its importance in the open ocean
Section: 30.02
Topic: Water Microbiology

2. Among the eukaryotic microbes in the phytoplankton, the ________ are most noted for their contribution to carbon fixation.
   A.dinoflagellates
   B. green algae
   C. diatoms
   D. cyanobacteria

ASM Objective: 06.01 Microbes are essential for life as we know it and the processes that support life (e.g. in biogeochemical cycles and plant and / or animal microbiota).
ASM Topic: Module 05 Microbial Systems
Blooms Level: 2. Understand
Learning Outcome: 30.02.03 Assess the importance of marine microbial primary productivity in the global carbon budget
Section: 30.02
Topic: Water Microbiology

3. The possible effect of failing to limit greenhouse gas emissions on the oceans is likely to be which of the following?
   A. An increase in dissolved methane will stimulate microbial growth.
4. An increase in dissolved methane will hinder microbial growth.
5. An increase in dissolved carbon dioxide will lower the pH.
6. An increase in dissolved carbon dioxide will raise the pH.

ASM Objective: 05.01 Microorganisms are ubiquitous and live in diverse and dynamic ecosystems.
ASM Objective: 06.01 Microbes are essential for life as we know it and the processes that support life (e.g. in biogeochemical cycles and plant and / or animal microbiota).
ASM Topic: Module 05 Microbial Systems
Blooms Level: 2. Understand
Learning Outcome: 30.01.01 Explain the carbonate equilibrium system and why it is important in the study of marine microbial biology
Section: 30.01
Topic: Water Microbiology

4. What fraction of all of the organic carbon on Earth results from microbial fixation of carbon dioxide in the oceans?
   A. About 3/4
   B.  About 1/2
   C.  About 1/4
   D.  About 1/8

ASM Objective: 06.01 Microbes are essential for life as we know it and the processes that support life (e.g. in biogeochemical cycles and plant and / or animal microbiota).
ASM Topic: Module 05 Microbial Systems
Blooms Level: 1. Remember
Learning Outcome: 30.02.03 Assess the importance of marine microbial primary productivity in the global carbon budget
Section: 30.02
Topic: Water Microbiology

5. The oceans contain about ______% of the Earth’s water.
   A. 91
   B.  93
   C.  95
   D.  97

ASM Objective: 05.01 Microorganisms are ubiquitous and live in diverse and dynamic ecosystems.
ASM Objective: 06.01 Microbes are essential for life as we know it and the processes that support life (e.g. in biogeochemical cycles and plant and / or animal microbiota).
ASM Topic: Module 05 Microbial Systems
Blooms Level: 1. Remember
Learning Outcome: 30.03.01 Appreciate the scarcity of freshwater on Earth
Section: 30.03
Topic: Water Microbiology