Ecosystem Hierarchy

Which of the following is the correct order of hierarchical organization in an ecosystem from smallest to largest?

• Community, organism, population

• Organism, population, community

• Population, community, organism

• Community, population, organism

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What is a population in an ecosystem?

• All the living and nonliving things in an area

• All the different species living in an area

• All the individuals of the same species living in an area

• A single individual organism

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Which term describes a group of different populations living together in one area?

• Organism

• Community

• Population

• Species

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If you observe a pond and see frogs, fish, and insects living together, what level of organization are you observing?

• Organism

• Population

• Community

• Ecosystem

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Which of the following best describes a community in an ecosystem?

• All the frogs in a pond

• All the living things in a pond

• All the water in a pond

• All the rocks in a pond

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A forest contains many deer, rabbits, and birds. Which of the following is an example of a population?

• All the animals in the forest

• All the deer in the forest

• All the plants in the forest

• All the birds and rabbits in the forest

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You are studying a group of oak trees in a park. Which level of organization are you focusing on?

• Organism

• Population

• Community

• Ecosystem

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If a scientist is observing how different populations of plants and animals interact in a meadow, what is she studying?

• Organism

• Population

• Community

• Cell

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A student lists the following: one squirrel, a group of squirrels, and squirrels, birds, and insects together. Match each to the correct level of organization.

• Organism, population, community

• Population, organism, community

• Community, population, organism

• Organism, community, population

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Which scenario best represents a population?

• A single wolf hunting in the forest

• A pack of wolves living and hunting together in the forest

• Wolves, deer, and rabbits living in the forest

• The trees, rocks, and soil in the forest

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