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Free Practice Quiz Question List

12. Ecosystem Dynamics and Conservation Online Quiz Questions

Use this free practice quiz with 20 questions to review 12. Ecosystem Dynamics and Conservation, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

Energy flows through an ecosystem, while matter cycles between organisms and the physical environment.

  1. A

    True

  2. B

    False

02
Choose one
1 point

Which option is an example of in situ conservation?

  1. A

    A seed bank preserving seeds

  2. B

    A wildlife refuge protecting a population in its natural habitat

  3. C

    A captive-breeding program in a zoo

  4. D

    Cryopreservation of tissue

03
Choose one
1 point

A city replaces vegetated ground with extensive paved surfaces. Which change in the water cycle is most likely?

  1. A

    It increases infiltration and decreases runoff.

  2. B

    It increases runoff and decreases infiltration.

  3. C

    It stops precipitation from occurring.

  4. D

    It converts groundwater directly into atmospheric nitrogen.

04
Choose all
1 point

Which processes are parts of the nitrogen cycle? Select all correct choices.

  1. A

    Nitrogen fixation

  2. B

    Transpiration

  3. C

    Nitrification

  4. D

    Denitrification

05
Choose all
1 point

Which statements about the phosphorus cycle are supported by the material? Select all correct choices.

  1. A

    Phosphorus is released by weathering of rocks.

  2. B

    Phosphorus has no major atmospheric gas phase.

  3. C

    Denitrification is the main process that returns phosphorus to the atmosphere.

  4. D

    Excess phosphorus can contribute to eutrophication in freshwater.

06
Fill in the blank
1 point

After excess nutrients cause an algal bloom, decomposition may consume dissolved oxygen and create conditions that harm aquatic organisms.

07
Fill in the blank
1 point

The combined loss of water through evaporation and transpiration is called .

08
Open ended
1 point

Design an evidence-based investigation to test how nutrient concentration affects freshwater ecosystem condition. Describe the treatments, independent and dependent variables, controlled variables, replication, measurements, data analysis, at least two potential confounding factors, and how the results could support a conservation or management recommendation.

09
Choose one
1 point

Which nitrogen-cycle process returns nitrogen gas to the atmosphere by converting nitrate into nitrogen gas?

  1. A

    Denitrification

  2. B

    Assimilation

  3. C

    Nitrification

  4. D

    Ammonification

10
True or false
1 point

True or false: Habitat fragmentation can increase genetic isolation and make populations more vulnerable to disturbance.

  1. A

    True

  2. B

    False

11
True or false
1 point

True or false: In an ecosystem, energy generally flows through the system, while matter cycles between organisms and the physical environment.

  1. A

    True

  2. B

    False

12
Choose one
1 point

A town replaces a vegetated area with roads and parking lots. Which change is most likely to occur during heavy rain?

  1. A

    Paving increases infiltration and decreases runoff.

  2. B

    Paving decreases infiltration and increases runoff.

  3. C

    Paving has no effect on infiltration or runoff.

  4. D

    Paving decreases both infiltration and runoff.

13
Choose one
1 point

A grassland has a gross primary productivity of 120 grams of carbon per square meter per year and producer respiration of 45 grams of carbon per square meter per year. What is its net primary productivity?

  1. A

    45 grams of carbon per square meter per year

  2. B

    75 grams of carbon per square meter per year

  3. C

    120 grams of carbon per square meter per year

  4. D

    165 grams of carbon per square meter per year

14
Choose one
1 point

A lake receives excess nitrogen and phosphorus from runoff. Which observation would most directly indicate that eutrophication is progressing?

  1. A

    Dissolved oxygen increases because algae permanently release oxygen after death.

  2. B

    Water clarity increases because algal biomass blocks less light.

  3. C

    Decomposition stops because nutrients have been removed from the water.

  4. D

    Dissolved oxygen decreases as decomposers break down dead algae.

15
Written response
1 point

What ecological term describes a non-native species that spreads and causes ecological, economic, or health-related harm?

16
Choose one
1 point

Which action is an example of in situ conservation?

  1. A

    Establishing a protected area in the species' native habitat

  2. B

    Storing the species' seeds in a seed bank outside its habitat

  3. C

    Breeding the species in captivity for display in a zoo

  4. D

    Preserving the species' DNA in a laboratory

17
Choose one
1 point

A highway project has divided a forest into isolated patches. Which management action would most directly reduce the effects of this fragmentation?

  1. A

    Increasing the width of roads around each habitat patch

  2. B

    Removing vegetation between isolated habitat patches

  3. C

    Creating a connected corridor between habitat patches

  4. D

    Allowing development along the edges of each habitat patch

18
Written response
1 point

The Kunming–Montreal Global Biodiversity Framework includes a target to place at least 30 percent of degraded ecosystems under effective restoration by what year?

19
Written response
1 point

An ecosystem has a gross primary productivity of 1,200 g C m^-2 yr^-1. Producer respiration is 500 g C m^-2 yr^-1, consumer respiration is 300 g C m^-2 yr^-1, and decomposer respiration is 200 g C m^-2 yr^-1. What is the ecosystem's net ecosystem productivity? Enter the numerical value in g C m^-2 yr^-1.

20
Written response
1 point

A persistent pollutant is present at low concentration in water, at a higher concentration in small fish, and at the highest concentration in fish-eating birds. What ecological process does this pattern illustrate? Enter the term.