Ecosystem Interactions and Energy Flow

Which of the following is a producer in a food web?

• Grass

• Wolf

• Mushroom

• Hawk

What is the main role of decomposers in an ecosystem?

• Producing food

• Breaking down dead organisms

• Hunting prey

• Competing for sunlight

Which term describes an organism that eats only plants?

• Carnivore

• Herbivore

• Omnivore

• Decomposer

Which of the following is an example of mutualism?

• A tick feeding on a dog

• A bee pollinating a flower

• A lion hunting a zebra

• A hawk eating a mouse

What is the primary source of energy for most food webs?

• Water

• Sunlight

• Soil

• Wind

Which of the following is a limiting factor in an ecosystem?

• Amount of sunlight

• Number of predators

• Availability of water

• All of the above

Which organism is a consumer in a food web?

• Oak tree

• Rabbit

• Sunflower

• Grass

What do decomposers return to the soil?

• Water

• Nutrients

• Sunlight

• Oxygen

Which of the following best describes commensalism?

• Both organisms benefit

• One benefits, the other is unaffected

• One benefits, the other is harmed

• Both are harmed

Which of the following is an example of a predator-prey relationship?

• Cow eating grass

• Hawk hunting a mouse

• Bee pollinating a flower

• Mushroom decomposing a log