Biodiversity and Evolution Quiz

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Questions and Answers

Which condition demonstrates the highest risk of extinction for a species?

  • Near threatened
  • Vulnerable
  • Critically endangered (correct)
  • Data deficient

What is a consequence of decreased biodiversity in a habitat?

  • Lower risk of population extinction
  • Greater resilience to environmental changes
  • Enhanced species interaction
  • Increased vulnerability to changes (correct)

What does the Red List of Threatened Species primarily provide?

  • The population size of various species
  • Methods for species preservation
  • A list of common species in an area
  • The conservation status of biological species (correct)

Which factor is categorized as anthropogenic in relation to extinction causes?

<p>Climate change (A)</p> Signup and view all the answers

What happens to species as ecosystems become more affected by climate change?

<p>Die due to inability to cope with rapid changes (C)</p> Signup and view all the answers

What is the classification of a species that no longer exists in the wild but survives in captivity?

<p>Extinct in the wild (A)</p> Signup and view all the answers

Which of the following categories has the least risk of extinction?

<p>Least concern (A)</p> Signup and view all the answers

What impact does sea level rise have on biodiversity?

<p>Threatens low-lying and coastal marsh habitats (B)</p> Signup and view all the answers

What is a potential consequence of melting icebergs?

<p>Receding shorelines (D)</p> Signup and view all the answers

How can volcanic gases affect marine life?

<p>By changing the chemical composition of water (A)</p> Signup and view all the answers

What was one significant impact of a large asteroid hitting Earth?

<p>The generation of tsunamis (D)</p> Signup and view all the answers

How does climate change affect species in relation to diseases?

<p>It decreases their ability to fend off disease (D)</p> Signup and view all the answers

Which of the following is the leading cause of modern-day extinction?

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

What is habitat fragmentation, and why is it a concern for large predators?

<p>It creates smaller hunting areas, leading to isolation (B)</p> Signup and view all the answers

How does pollution impact species populations?

<p>It disrupts life cycles and causes biodiversity decline (C)</p> Signup and view all the answers

What is the effect of insecticides on non-target insects?

<p>They can kill beneficial insects necessary for pollination (B)</p> Signup and view all the answers

What can acid rain lead to in terms of wildlife impact?

<p>Killing agricultural crops and fish (A)</p> Signup and view all the answers

What is overexploitation primarily concerned with?

<p>Excessive use of natural resources (C)</p> Signup and view all the answers

What is the primary issue caused by invasive species?

<p>Decrease in biodiversity (C)</p> Signup and view all the answers

Which term describes a species that is at a high risk of extinction?

<p>Endangered (D)</p> Signup and view all the answers

Which of the following is a consequence of pollution in a habitat?

<p>Species extinction (D)</p> Signup and view all the answers

How do anthropogenic factors relate to species extinction?

<p>They are caused by human activities (D)</p> Signup and view all the answers

What is meant by the term 'invaded ecosystem'?

<p>An ecosystem disrupted by non-native species (B)</p> Signup and view all the answers

What primary factor is currently believed to contribute most to extinction?

<p>Anthropogenic actions (A)</p> Signup and view all the answers

Flashcards

Biodiversity

The variety of life in a habitat, measured by the number of different species.

Evolution

Changes in genetic makeup of a population over time.

IUCN Red List

A global list of threatened species, categorized by extinction risk.

Extinct Species

Species that no longer exist anywhere on Earth.

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Extinct in the Wild

Species existing only in captivity or protected areas.

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Climate Change

Significant changes in long-term weather patterns, often becoming warmer.

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Anthropogenic factors

Factors caused by human activities that have negative impact on biodiversity.

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Sea-level rise

Increase in the average global sea level due to factors like melting ice.

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Acid Rain

Rainwater contaminated by pollutants, primarily sulfur dioxide and nitrogen oxides, making it acidic.

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Overexploitation

The excessive use of a natural resource, particularly exceeding its sustainable rate of replenishment, leading to depletion.

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Invasive Species

Non-native species that disrupt the ecosystems they colonize by outcompeting native species for resources and altering habitat.

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Habitat

The natural environment where a species lives, providing all necessary resources for survival and reproduction.

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Threatened Species

Species facing a high risk of extinction in the near future due to factors like habitat loss, overexploitation, or disease.

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Receding Shorelines

The gradual retreat of shorelines due to factors like melting icebergs, typhoons, and storm surges.

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Volcanic Impact on Marine Life

Volcanic eruptions can release gases that are absorbed by water, altering its chemical composition and making it unsuitable for certain marine life.

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Asteroid Impact and Extinction

A large asteroid impact can cause devastating consequences, including seismic waves, tsunamis, and mass extinctions.

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Climate Change and Disease Susceptibility

Changing climate and landscapes can weaken species' defenses against diseases, making them more vulnerable to epidemics and potentially extinction.

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Foot and Mouth Disease

A highly contagious disease that affects livestock, potentially causing significant economic losses and posing a risk to human health.

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Bird Flu

A lethal disease that spreads between birds and can be fatal to humans, posing a significant public health threat.

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Ebola Virus

A deadly disease that primarily affects primates, but can spread to humans, leading to severe outbreaks and high mortality rates.

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Habitat Destruction

The leading cause of modern extinction, involving the removal or degradation of natural habitats due to human activities.

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Deforestation

The clearing of forests for non-forest use, resulting in habitat loss and biodiversity decline.

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Insecticide Use and Biodiversity Loss

The use of insecticides can kill non-target insects including beneficial species, disrupting pollination and affecting biodiversity.

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Habitat Fragmentation

The division of large habitats into smaller, isolated patches, threatening the survival of species that require large territories.

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Pollution's Impact on Biodiversity

Air, water, and soil pollution can disrupt life cycles, harm species' health, and contribute to biodiversity decline.

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Study Notes

Biodiversity and Evolution

  • Biodiversity, also called biological diversity, refers to the variety of plant and animal species in a specific habitat. More diverse species mean better biodiversity. Less diverse species mean greater vulnerability to change.
  • A habitat is the place where specific species live.

Evolution

  • Evolution is a change in the genetic makeup of a population over multiple generations.

IUCN

  • The International Union for the Conservation of Nature (IUCN) is an organization promoting research and studies on preserving worldwide flora and fauna.

Red List of Threatened Species

  • The Red List is a comprehensive inventory of the global conservation status of biological species.

Categories of Species in the Red List

  • Extinct: No living species of that kind remain.
  • Extinct in the Wild: The species only survives in captivity.
  • Critically Endangered: Extremely high risk of extinction.
  • Endangered: High risk of extinction
  • Vulnerable: High risk of endangerment
  • Near Threatened: Likely to become endangered in the near future.
  • Least Concern: Still found abundantly in their environment.
  • Data Deficient: Insufficient data for evaluation.
  • Not Evaluated: No data available.

Extinction

  • Extinction occurs when a species fails to adapt to rapid environmental changes.

Causes of Extinction

  • Natural Factors:
    • Climate change: Significant variation in weather conditions (warming, cooling, etc.), over long periods.
    • Changes in sea level or currents: Melting polar ice and glaciers, receding shorelines.
    • Meteor, comet, or asteroid strikes: Large impacts causing seismic waves, tsunamis and changes to environments.
  • Anthropogenic (Human-Made) Factors:
    • Habitat destruction: Deforestation, converting forests into other land uses, and clearing land.
    • Pollution: Air, water, and soil pollution negatively impacting populations and biodiversity.
    • Overexploitation: Overuse of natural resources (e.g., harvesting).
    • Introduction of invasive species: Non-native species displacing native species.
    • Diseases and epidemics: Species becoming susceptible to disease due to changing climates.
    • Volcanic eruptions: Massive damage and changes in climate.

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