Textbook Question
Anammox reactions are:
a. Anaerobic and part of nitrogen cycling
b. Anaerobic and part of carbon cycling
c. Aerobic and part of sulfur cycling
d. Aerobic and part of metal ion oxidation
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1. Introduction to Microbiology
Importance of Microorganisms
Multiple Choice
Which group of organisms contributes most to the decomposition of dead organisms?
A
Protozoa
B
Bacteria and fungi
C
Viruses
D
Algae
Verified step by step guidance1
Understand the role of decomposition in ecosystems: decomposition is the process by which dead organic matter is broken down into simpler substances, recycling nutrients back into the environment.
Identify the main groups of organisms involved in decomposition: these typically include bacteria, fungi, protozoa, viruses, and algae.
Evaluate the capabilities of each group: bacteria and fungi are known for producing enzymes that break down complex organic materials such as proteins, cellulose, and lignin, which are abundant in dead organisms.
Consider the roles of protozoa, viruses, and algae: protozoa mainly consume bacteria and other small organisms, viruses infect living cells but do not decompose dead matter directly, and algae primarily perform photosynthesis rather than decomposition.
Conclude that bacteria and fungi are the primary decomposers because they enzymatically degrade dead organic material, making nutrients available for other organisms in the ecosystem.
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