Ecological Levels of Organization

Which of the following is the most simple level of ecological organization?

• A community

• An organism

• A population

• An ecosystem

Which level of ecological organization is composed of many similar ecosystems with the same climate and geographic locations?

• community

• population

• biome

• biosphere

A collection of organisms that belong to different populations but all live in the same area and interact with one another.

• Population

• Ecosystem

• Community

• Ecosphere

A collection of organisms that make up a community as well as all of the nonliving components of the environment.

• Population

• Community

• Habitat

• Ecosystem

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Place the ecology levels of organization in proper order (smallest to largest)

• organism > population > community > ecosystem > biosphere

• community > organism > ecosystem > biosphere > population

• organism > community > biosphere > population > ecosystem

• population > biosphere > ecosystem > community > organism

Match the following definitions and terms.

• Population

• All the interacting species in an area; includes only the biotic factors and excludes the abiotic factors in an area.

• Biosphere

• Members of the same species that live in the same area at the same time.

• Ecosystem

• An individual life form.

• Organism

• All living things and the physical environment with which they interact in a particular area; all the biotic and abiotic factors in an area.

• Community

• Consists of all the Earth’s biotic and abiotic factors or living and once-living things and the physical environment with which they interact; the sum of all ecosystems on Earth.

Tags

NGSS.MS-LS2-2

What are the six major levels of organization, from smallest to largest, that ecologists commonly study?

• Biosphere, biome, ecosystem, community, population, species

• Organism, population, community, ecosystem, biome, biosphere

• Organism, community, population, ecosystem, biome, ecology

• Abiotic factor, biotic factor, species, population, biome, biosphere

What level of organization can be observed in the image?

• Species

• Population

• Community

• Ecosystem

Which of the following has the levels of organization in order from smallest to largest?

• Biosphere, Ecosystem, Community, Population, Species, Organism

• Organism, Species, Community, Ecosystem, Biosphere

• Organism, Species, Community, Population, Ecosystem, Biosphere

• Biosphere, Ecosystem, Community, Population, Organism, Species

The science of ecology includes which of the following levels of organization in the correct order from smallest to largest?

• populations—communities—organisms—ecosystems

• communities—organisms—ecosystems— populations

• organisms—populations—communities—ecosystems

• ecosystems—communities—organisms— populations