MCU3 Lesson 1 Quiz

If a location is marked on a map as a biodiversity hotspot, what would scientists expect to find at this location?

• An ecosystem with very few plants and animals living in it.

• An ecosystem with a large variety of plants and animals that is threatened.

• An ecosystem that has experienced a disturbance that it cannot recover from.

• An ecosystem that has experienced a disruption in the flow of matter and energy through it.

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Coral reefs are found in costal ecosystems. Coral reefs have a high biodiversity. Which statement is true about coral reefs?

• Matter and energy are not easily passed throughout a coral reef.

• Coral reefs usually contain only a few different types of fish and coral.

• Coral reefs would not be able to recover from an ecosystem disturbance.

• There are many different species of plants and animals found on a coral reef.

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Wetlands are natural parts of watershed systems. Wetlands provide many benefits. Which of these is a way that wetlands directly benefit humans?

• provide a nesting grounds for birds

• decrease erosion along shorelines

• reduce flooding in adjacent towns

• increase biodiversity near the ocean

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Which of these describes a way in which humans could increase biodiversity in a marine ecosystem?

• They could introduce new species to the ecosystem/

• They could limit fishing to only one kind of fish in the ecosystem.

• They could ban boating, snorkeling, and scuba diving in the ecosystem.

• They could restrict the amount of each type of fish or shellfish harvested from the ecosystem. .

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Which of these characteristics is often used as a measure of an ecosystem's health?

• the variety of species that live there

• the number of people who live there

• the amount of pollution that occurs there

• the types of activities that can be done there

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Which ecosystem most likely has the greatest biological diversity?

• a tank that includes several goldfish

• a tundra region that has many penguins

• a pine tree in which three groups of birds live

• a rainforest that has many different types of plants and animals

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How does the biodiversity in an ecosystem relate to how quickly an ecosystem can recover from a disturbance?

• The number of species increases the ability of the ecosystem to recover from disturbance.

• The number of species decreases the ability of an ecosystem to recover from the disturbance.

• The number of species present in an ecosystem remains constant before an after a disturbance.

• The number of species does not affect the time needed for an ecosystem to recover from a disturbance.

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In order to make crop growing more economical, crops such as wheat, corn, and potatoes are grown in large areas where the plants have been removed. Why can this type of planting style make crops more prone to outbreaks of disease?

• The high species diversity associated with croplands leads to poor crop health.

• Biodiversity of the cultivated land where the crops grow is very low.

• Genetic diversity in crops is typically high, leading to more disease outbreaks.

• All ecosystems managed by humans have low biodiveristy and poor health.

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What can you tell about this population of king penguins and their ecosystem from the photo?

• There is low genetic diversity in this population of king penguins.

• Not a lot of species diversity can be seen in this photo.

• A lot of species diversity is shown in this photo.

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This photo shows the restoration efforts at a former open-pit mine. How will the restoration of this land most likely affect population of organisms in the surrounding areas.

• Biodiversity will increase

• Population sizes will likely decrease

• Stability will likely decrease

• Disturbances will likely increase.

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