Ecosystem Hierarchy: TEKS 6.12C

Which of the following best describes the hierarchical organization of an ecosystem from smallest to largest?

• Community, Population, Organism

• Organism, Population, Community

• Population, Community, Organism

• Community, Organism, Population

In a forest ecosystem, which of the following is an example of a population?

• All the trees in the forest

• All the animals in the forest

• All the oak trees in the forest

• All the living and non-living things in the forest

How does a community differ from a population in an ecosystem?

• A community includes only one species, while a population includes multiple species.

• A community includes multiple species, while a population includes only one species.

• A community includes non-living things, while a population does not.

• A community is smaller than a population.

Consider a pond ecosystem. If the number of frogs increases, what might be a possible effect on the insect population?

• The insect population will increase.

• The insect population will decrease.

• The insect population will remain the same.

• The insect population will become extinct.

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4

NGSS.MS-LS2-1

Which of the following scenarios best illustrates the concept of a community within an ecosystem?

• A group of wolves living in a forest

• A wolf, a deer, and a rabbit living in a forest

• A single wolf hunting in a forest

• A pack of wolves hunting together

Tags

NGSS.MS-LS2-2

If a disease affects only the rabbit population in a grassland ecosystem, what could be a potential impact on the ecosystem?

• The grass population will decrease.

• The predator population that feeds on rabbits will decrease.

• The entire ecosystem will collapse.

• There will be no impact on the ecosystem.

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4

NGSS.MS-LS2-1

Which of the following is an example of an organism in an ecosystem?

• A school of fish

• A single fish

• A coral reef

• A group of dolphins

In a desert ecosystem, if the cactus population decreases, what might be a possible effect on the ecosystem?

• The ecosystem will become a forest.

• The animal species that rely on cacti for water will decrease.

• The ecosystem will not be affected.

• The temperature of the ecosystem will decrease.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

What is the primary difference between a population and a community in an ecosystem?

• A population includes non-living things, while a community does not.

• A population is a group of the same species, while a community includes different species.

• A population is larger than a community.

• A population includes different species, while a community includes the same species.

If a new predator is introduced into an ecosystem, what could be a potential impact on the existing populations?

• The prey populations will increase.

• The prey populations will decrease.

• The ecosystem will not change.

• The predator will become extinct.

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4