Ecosystems and Ecological Interactions Quiz

Test your knowledge on ecosystem ecology with questions about decomposers, energy sources, keystone species, succession, and more!

#1

Which of the following is an example of a decomposer in an ecosystem?

Grass
Wolf
Fungi
Deer
#2

What is the primary source of energy in most ecosystems?

Water
Sunlight
Wind
Soil
#3

Which of the following is an abiotic factor in an ecosystem?

Sunlight
Fungi
Deer
Bacteria
#4

What is the term for the variety of life forms in an ecosystem?

Habitat
Ecosystem
Biodiversity
Trophic level
#5

Which of the following is NOT a greenhouse gas?

Carbon dioxide
Oxygen
Methane
Nitrous oxide
#6

What is the term for the process by which organisms convert light energy into chemical energy?

Photosynthesis
Respiration
Transpiration
Fermentation
#7

Which of the following is NOT a trophic level in a food chain?

Producer
Primary consumer
Secondary consumer
Decomposer
#8

Which term describes the relationship where both organisms benefit?

Parasitism
Commensalism
Mutualism
Predation
#9

What is the process by which water is continuously exchanged between the atmosphere, land, and water bodies?

Photosynthesis
Condensation
Evaporation
Hydrological cycle
#10

What is the term for the process by which nutrients are returned to the soil from dead organisms?

Decomposition
Photosynthesis
Predation
Eutrophication
#11

Which of the following best describes a climax community?

An early stage of ecological succession
A stable, mature community
A community that has been disturbed by human activity
A community that lacks biodiversity
#12

Which of the following is an example of a pioneer species?

Grass
Oak tree
Moss
Cactus
#13

What is the term for the maximum population size that a particular environment can sustain?

Carrying capacity
Biome
Ecological footprint
Population density
#14

What is the term for the role an organism plays in its ecosystem, including its interactions with other organisms and the environment?

Habitat
Niche
Biome
Ecosystem service
#15

Which of the following is an example of a keystone species?

Deer
Bee
Grass
Sea otter
#16

What is the term for the process by which a population becomes better suited to its environment over time?

Adaptation
Speciation
Mutation
Extinction
#17

Which of the following is an example of primary succession?

Reforestation after a forest fire
Growth of plants on a recently abandoned farm
Growth of moss on a rock
Colonization of a volcanic island by plants
#18

What is the term for the process by which individuals with advantageous traits are more likely to survive and reproduce?

Natural selection
Artificial selection
Genetic drift
Gene flow
#19

Which of the following is an example of secondary succession?

Overgrazing leading to desertification
Reforestation after logging
Colonization of a newly formed sand dune
Growth of grass on a paved parking lot

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