#1
Which organism is typically found at the top of a food chain?
Producer
Primary consumer
Secondary consumer
Tertiary consumer
#2
What do primary consumers eat?
Producers
Other consumers
Decomposers
Sunlight
#3
Which of the following is an example of a biotic factor in an ecosystem?
Sunlight
Temperature
Water
Grass
#4
Which of the following is an example of a secondary consumer?
Herbivore
Carnivore
Producer
Omnivore
#5
What is the term for a group of organisms of the same species living in the same area?
Population
Community
Ecosystem
Biosphere
#6
Which of the following is an example of an abiotic factor in an ecosystem?
Plants
Soil
Insects
Bacteria
#7
Which of the following best describes a decomposer in a food chain?
An organism that eats other organisms
An organism that produces its own food
An organism that breaks down dead organic matter
An organism that preys on other organisms
#8
What is the main source of energy for most ecosystems?
Air
Water
Sunlight
Geothermal heat
#9
What is the term for the process by which water vapor is released from plants into the atmosphere?
Condensation
Transpiration
Precipitation
Evaporation
#10
What is the primary role of bacteria in a food chain?
To produce energy
To consume other organisms
To decompose dead organic matter
To perform photosynthesis
#11
What is the main function of a trophic level in a food chain?
To regulate population sizes
To transfer energy between organisms
To provide shelter for predators
To maintain the water cycle
#12
Which of the following is an example of a detritivore?
Wolf
Earthworm
Grasshopper
Rabbit
#13
In a food chain, what happens to energy as it moves from one trophic level to the next?
It increases
It decreases
It remains constant
It fluctuates
#14
Which of the following best describes a keystone species?
A species that is at the top of the food chain
A species that has a disproportionately large effect on its environment
A species that is highly susceptible to extinction
A species that is resistant to environmental change
#15
Which of the following factors is NOT considered a density-dependent limiting factor on population growth?
Food availability
Predation
Weather conditions
Disease
#16
Which of the following is an example of a top-down control on an ecosystem?
Predator-prey interactions
Climate change
Natural disasters
Nutrient cycling
#17
What is the term for the process by which phosphorus is released from rocks and minerals into the soil?
Phosphorus fixation
Phosphorus assimilation
Phosphorus cycling
Phosphorus weathering
#18
Which of the following is an example of a primary succession?
A forest fire
A volcanic eruption
The colonization of a newly formed island
The regrowth of vegetation after a hurricane