Ecology Quiz 1- Energy Roles

Which of the following best describes the role of producers in an ecosystem?

• They break down dead organisms and recycle nutrients.

• They convert sunlight into chemical energy through photosynthesis.

• They consume other organisms for energy.

• They compete with other organisms for resources.

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NGSS.MS-LS2-1

In a food web, what is the primary role of decomposers?

• To produce energy from sunlight.

• To consume primary consumers.

• To break down dead material and return nutrients to the soil.

• To compete with producers for sunlight.

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NGSS.MS-LS2-2

How do consumers obtain energy in an ecosystem?

• By producing their own food through photosynthesis.

• By consuming other organisms.

• By decomposing organic matter.

• By absorbing sunlight directly.

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NGSS.MS-LS2-1

Which of the following is an example of a food chain?

• Grass → Rabbit → Fox

• Sunlight → Water → Soil

• Tree → Soil → Water

• Fish → Algae → Sunlight

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NGSS.MS-LS2-2

What pattern of interaction is shown when a hawk preys on a rabbit in an ecosystem?

• Mutualism

• Competition

• Predation

• Parasitism

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NGSS.MS-LS2-2

In a forest ecosystem, which organism is most likely to be a primary consumer?

• Oak tree

• Deer

• Wolf

• Mushroom

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NGSS.MS-LS2-1

What is the main difference between a food chain and a food web?

• A food chain shows all possible feeding relationships, while a food web shows a single path.

• A food web shows all possible feeding relationships, while a food chain shows a single path.

• A food chain includes decomposers, while a food web does not.

• A food web includes producers, while a food chain does not.

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NGSS.MS-LS2-3

Which of the following organisms is most likely to be at the top of a food web?

• Grass

• Rabbit

• Eagle

• Frog

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NGSS.MS-LS2-3

How do decomposers contribute to the nutrient cycle in an ecosystem?

• By producing energy from sunlight.

• By consuming primary producers.

• By breaking down dead organisms and releasing nutrients back into the soil.

• By competing with consumers for food.

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NGSS.MS-LS2-2

What is the role of a secondary consumer in a food chain?

• To produce energy from sunlight.

• To consume primary consumers.

• To decompose organic matter.

• To compete with producers for resources.

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NGSS.MS-LS2-3