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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?

Biodiversity allows ecosystems to be resilient to disturbances Signup and view all the answers

What are the two criteria for an area to be considered a biodiversity hotspot?

The area must have at least 1,500 endemic species and have lost at least 70% of its primary vegetation Signup and view all the answers

How is genetic diversity within a species measured?

Genetic diversity is measured by the proportion of genes with more than one allele and the number of possible alleles per gene Signup and view all the answers

What does the term 'community' refer to in the definition of an ecosystem?

All living organisms of all species found in a particular ecosystem at a particular time Signup and view all the answers

Which of the following is NOT considered at the ecosystem level of organization?

The genetic variation within each species Signup and view all the answers

What is the significance of biodiversity in maintaining the natural balance of nature?

It ensures proper functioning and self-regulation of large ecosystems Signup and view all the answers

Which of the following is NOT an example of an ecosystem mentioned in the text?

Mountain ecosystem Signup and view all the answers

What does the term 'biodiversity' refer to according to the text?

The variety of ecosystems and species in an area and the genetic diversity within each species Signup and view all the answers

Which of the following is NOT a component of biodiversity that is assessed according to the text?

The interactions between living and non-living components of an ecosystem Signup and view all the answers