Soil Microorganisms: Types and Functions
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Questions and Answers

What are the five types of soil microbes mentioned in the text?

  • Bacteria, fungi, protozoa, nematodes, and viruses
  • Bacteria, actinomycetes, fungi, protozoa, and nematodes (correct)
  • Bacteria, actinomycetes, fungi, protozoa, and algae
  • Bacteria, fungi, protozoa, nematodes, and archaea

What is the typical shape of bacteria found in soil?

  • Rod (correct)
  • Spiral
  • Spherical
  • Filamentous

Where are most bacteria found in soil?

  • Bulk soil
  • Rhizospheric region (correct)
  • Subsoil
  • Topsoil

What is a characteristic of bacteria in the rhizosphere compared to those in the bulk soil?

<p>Larger in size (C)</p> Signup and view all the answers

What is a role of bacteria in soil?

<p>Providing ecosystem services (A)</p> Signup and view all the answers

Which of the following bacteria genera is commonly found in soil?

<p>Bacillus (B)</p> Signup and view all the answers

What is the role of polysaccharides and glycoproteins produced by soil bacteria?

<p>They form a layer on the surface of the soil particle, acting as cementing agents (D)</p> Signup and view all the answers

What is the contribution of bacteria in biogeochemical cycles?

<p>They are involved in the production of a large number of nutrients for the soil and the plants (C)</p> Signup and view all the answers

How do bacteria enhance the process of natural succession?

<p>By improving the quality of soil, allowing new plant communities to survive (A)</p> Signup and view all the answers

What is the role of bacterial communities in soil?

<p>They act as indicators of soil condition (D)</p> Signup and view all the answers

What is a negative effect of pathogenic bacteria in the soil?

<p>They result in poor crop health, poor yields, and crop loss (D)</p> Signup and view all the answers

What can be a result of the release of by-products by bacteria in soil?

<p>A change in the chemical properties of soil, such as pH and cation exchange capacity (B)</p> Signup and view all the answers

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