Energy Roles in Ecosystems

Which organisms are considered producers in an ecosystem?

• Animals and fungi

• Viruses and archaea

• Algae and protozoa

• Plants and some bacteria

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What is the primary role of consumers in an ecosystem?

• Producing energy and nutrients for other organisms

• Consuming other organisms for energy and nutrients

• Maintaining the physical structure of the ecosystem

• Regulating the climate in the ecosystem

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What do decomposers do in an ecosystem?

• Decomposers break down dead organisms and organic waste into simpler substances.

• Decomposers consume live organisms for energy.

• Decomposers help plants grow by providing nutrients.

• Decomposers release harmful toxins into the environment.

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What is a food chain?

• A food chain is a sequence of organisms where each organism eats only meat.

• A food chain is a linear sequence of organisms where each organism is eaten by the next organism in the sequence.

• A food chain is a sequence of organisms where each organism eats only plants.

• A food chain is a circular sequence of organisms where each organism eats the next organism in the sequence.

Give an example of a food chain.

• Grass -> Grasshopper -> Bird -> Lion

• Plankton -> Krill -> Penguin -> Seal

• Algae -> Shrimp -> Fish -> Shark

• Grass -> Grasshopper -> Frog -> Snake

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What is a food web?

• A food web is a recipe for a popular dish.

• A food web is a type of diet plan for weight loss.

• A food web is a diagram that shows the feeding relationships between different organisms in an ecosystem.

• A food web is a type of fishing net used to catch seafood.

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Explain the difference between a food chain and a food web.

• A food chain consists of only producers, while a food web includes both producers and consumers.

• A food chain is a linear sequence of organisms, while a food web is a network of interconnected food chains.

• A food chain shows the flow of energy, while a food web shows the flow of matter.

• A food chain is simpler and less complex than a food web.

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What happens to energy as it moves through a food chain or food web?

• Energy increases

• Energy stays the same

• Energy is converted into matter

• Energy decreases

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Why are producers essential for the survival of an ecosystem?

• Producers convert sunlight into energy through photosynthesis.

• Producers release harmful toxins into the environment.

• Producers consume energy from other organisms in the ecosystem.

• Producers convert carbon dioxide into energy through photosynthesis.

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How do decomposers contribute to nutrient recycling in an ecosystem?

• By consuming nutrients and preventing them from being recycled

• By producing toxins that inhibit nutrient recycling

• By competing with other organisms for nutrients and reducing recycling

• By breaking down dead organic matter and releasing nutrients back into the ecosystem.

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