Honors Quiz Exploring Biodiversity and Ecosystems

What is biodiversity?

• The variety of life in a particular habitat or ecosystem

• The number of species that have gone extinct

• The introduction of non-native species to an ecosystem

• The process of species evolving over time

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Which of the following is a characteristic of a keystone species?

• It is the most abundant species in an ecosystem

• It has a disproportionate effect on its environment relative to its abundance

• It is always a predator

• It is the largest species in an ecosystem

What is one major cause of extinction?

• Increased biodiversity

• Habitat destruction

• Introduction of native species

• Balanced ecosystems

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How do invasive species affect native ecosystems?

• They always improve biodiversity

• They often outcompete native species for resources

• They have no impact on native species

• They only affect plant species

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Why is biodiversity important for ecosystems?

• It decreases the resilience of ecosystems

• It increases the likelihood of species extinction

• It enhances ecosystem productivity and stability

• It reduces the number of species interactions

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Which of the following is a conservation strategy to protect biodiversity?

• Overharvesting resources

• Establishing protected areas

• Introducing invasive species

• Increasing pollution levels

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How can the loss of a keystone species affect an ecosystem?

• It has no significant impact

• It can lead to the collapse of the ecosystem

• It only affects the species that directly interact with it

• It increases the number of predators

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What is a common effect of invasive species on native species?

• They help native species thrive

• They often lead to a decline in native species populations

• They have no effect on native species

• They increase the genetic diversity of native species

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Explain how human activities contribute to species extinction.

• By creating more habitats for species

• Through pollution, habitat destruction, and overexploitation

• By increasing the genetic diversity of species

• By reducing the number of invasive species

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Discuss the role of keystone species in maintaining ecosystem balance.

• They are the least important species in an ecosystem

• They help regulate the populations of other species

• They only affect the plant species in an ecosystem

• They are always the top predators

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