Biodiversity and Ecosystems Quiz

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Questions and Answers

What is the role of microorganisms in the nitrogen cycle?

  • Microorganisms convert nitrates to nitrogen gas
  • Microorganisms convert ammonia to nitrates
  • Microorganisms convert nitrogen gas to ammonia (correct)
  • Microorganisms are not involved in the nitrogen cycle

How do plants help regulate the world's climate and maintain optimal atmospheric conditions?

  • Plants release carbon dioxide and absorb oxygen
  • Plants release oxygen and absorb carbon dioxide (correct)
  • Plants have no effect on atmospheric conditions
  • Plants release both oxygen and carbon dioxide

What is the relationship between mycorrhizal fungi and plant roots?

  • Mycorrhizal fungi have a symbiotic relationship with plant roots, enhancing water and nutrient uptake (correct)
  • Mycorrhizal fungi are parasitic on plant roots
  • Mycorrhizal fungi are toxic to plant roots
  • Mycorrhizal fungi have no relationship with plant roots

What is the primary function of biodiversity in ecosystems?

<p>Biodiversity allows ecosystems to be resilient to disturbances (A)</p>
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What are the two criteria for an area to be considered a biodiversity hotspot?

<p>The area must have at least 1,500 endemic species and have lost at least 70% of its primary vegetation (D)</p>
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How is genetic diversity within a species measured?

<p>Genetic diversity is measured by the proportion of genes with more than one allele and the number of possible alleles per gene (B)</p>
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What does the term 'community' refer to in the definition of an ecosystem?

<p>All living organisms of all species found in a particular ecosystem at a particular time (B)</p>
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Which of the following is NOT considered at the ecosystem level of organization?

<p>The genetic variation within each species (A)</p>
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What is the significance of biodiversity in maintaining the natural balance of nature?

<p>It ensures proper functioning and self-regulation of large ecosystems (D)</p>
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Which of the following is NOT an example of an ecosystem mentioned in the text?

<p>Mountain ecosystem (B)</p>
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What does the term 'biodiversity' refer to according to the text?

<p>The variety of ecosystems and species in an area and the genetic diversity within each species (B)</p>
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Which of the following is NOT a component of biodiversity that is assessed according to the text?

<p>The interactions between living and non-living components of an ecosystem (B)</p>
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