MCU1: Lesson 3 Quizizz

The image shows one type of decomposer.

Which statement describes the role of decomposers in a food web?

• • Decomposers are not necessary in a food web

• • 
    

    Decomposers create energy by producing their own food.

• • 
    

    Decomposers break down matter so plants can use it.

• Decomposers are not necessary in a food web.

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Producers and consumers are both pictured in a diagram of a food web. Which statement best describes how they differ from one another?

• Consumers produce all the energy they need.

• Consumers eat only animals, and producers eat only plants.

• Producers eat living organisms, and consumers eat organisms that have died.

• Consumers obtain energy by eating food, and producers obtain energy from sunlight.

What is the primary role of decomposers in a food web?

• to control the population of producers and consumers

• to compete with producers for energy and other resources

• to provide a source of energy for the producers in the ecosystem

• • 
    

    to recycle energy and materials from dead producers and consumers

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Different grasses are observed in a habitat in a schoolyard. Why is grass an essential part of a healthy ecosystem?

• It is a producer that is a necessary part of the diet of most consumers.

• It is a consumer that feeds off other organisms living in the area.

• It is a decomposer that converts matter into a form that other organisms can use.

• It makes up the last level of a food web, helping recycle carbon in the habitat.

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A student is identifying food chains in a diagram of a food web. Which of these organisms might be a consumer?

• • 
    

    frog

• • 
    

    water lily

• redwood tree

• athlete’s foot fungus

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A mangrove swamp contains many organisms living among the large roots of the mangrove trees. The food web shows some of the relationships in that ecosystem.

According to the food web, which organism is a producer in the mangrove swamp?

• mold

• • 
    

    prawn

• • 
    

    pelican

• phytoplankton

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The figure shows a food chain that might exist in a meadow.

If there was a decrease in the beetle population, how might the food chain be affected?

• The owl population would decrease.

• The population of green plants would decrease.

• The toad and snake populations would increase.

• The green plants and toad populations would decrease.

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What is the role of a producer in a food web?

• To consume other organisms for energy

• To break down dead organisms and recycle their nutrients

• To produce energy through photosynthesis and serve as a food source for consumers

• To regulate the population of other organisms in the ecosystem

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These two species of birds, the egret and heron, eat the same types 

of fish as their maindiet. They live in the same ecosystem. 

How would the egrets in this area MOST LIKELY respond if all of the herons were removed from the area?

• They would move to different ponds.

• They would change to another diet.

• They would build fewer nests.

• They would have an increase in population.

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Look at the food web of a pond ecosystem.

Which food chain shows the correct flow of energy in the pond 

of the food web?

• 
• 
• 
• 

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