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Biodiversity: Importance and Components

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Questions and Answers

What does biodiversity typically measure?

Variation at genetic, species, and ecosystem level (correct)

Variation only at the ecosystem level

Variation only at the genetic level

Variation only at the species level

Why are ecosystems with high biodiversity more resilient to environmental changes?

Due to low genetic diversity

Due to the number of different species present (correct)

Due to the abundance of non-living things

Due to the genetic makeup of the species

What does low genetic diversity in koalas imply?

The population is immune to diseases

The population is less likely to be devastated by disease

The population can easily be devastated by disease (correct)

The population has high species diversity

Which ecosystem exhibits high species diversity according to the text?

Rainforest Signup and view all the answers

What does DNA stand for?

Deoxyribonucleic acid Signup and view all the answers

What are biotic components of an ecosystem?

Living things like plants, animals, and bacteria Signup and view all the answers

What is the role of nitrogen fixing bacteria in the soil?

Converting atmospheric nitrogen into a form that plants can use for growth Signup and view all the answers

How does deforestation impact water quality?

Causes changes to water quality due to soil erosion and loss of tree cover Signup and view all the answers

What is the main cause of desertification?

Overgrazing and harmful agricultural practices Signup and view all the answers

How does overharvesting impact marine ecosystems?

Reduces fish populations and disrupts marine food webs Signup and view all the answers

What defines a keystone species in an ecosystem?

A species that is critical to the ecosystem, without which the ecosystem is in great danger Signup and view all the answers

What is one direct consequence of introducing invasive species into an ecosystem?

Disruption of food chains and ecosystems with potential loss of biodiversity Signup and view all the answers