Unit 1 & 2 Ecosystems and Energy FlowStudy Guide

Which of the following represents the correct order of biological organization from smallest to largest?

• Organism → Population → Community → Ecosystem → Biosphere

• Ecosystem → Community → Population → Organism → Biosphere

• Population → Organism → Ecosystem → Community → Biosphere

• Biosphere → Ecosystem → Community → Organism → Population

A group of gray wolves living and hunting together in Yellowstone National Park is an example of a:

• Community

• Population

• Ecosystem

• Biosphere

Tags

NGSS.MS-LS2-4

Which of the following is an example of a community?

• A pond and the rocks, soil, and water within it

• All maple trees in a forest

• Maple trees, squirrels, and birds living in the same forest

• A single maple tree

Which level of biological organization includes both living and nonliving components?

• Ecosystem

• Organism

• Community

• Population

Tags

NGSS.MS-LS2-3

The biosphere can best be described as:

• All ecosystems on Earth

• All organisms in a given population

• A region that includes producers and consumers

• All organisms in a single community

A scientist models how drought affects a desert ecosystem. What is the best description of this task?

• Modeling a population

• Modeling an organism

• Modeling an ecosystem

• Modeling a biosphere

Tags

NGSS.MS-LS2-3

Which statement demonstrates understanding of levels of organization?

• An ecosystem only includes living things

• Populations are smaller than organisms

• Communities include multiple species

• Biosphere is smaller than a community

A student builds a model of how fish, algae, and bacteria interact in a lake. Which levels of organization does this represent?

• Ecosystem

• Biosphere

• Population

• Community

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

Which example best shows how changes at one level affect another?

• A. A tree grows one new branch

• B. A fish swims to deeper water

• C. Decreased rabbit population causes decline in fox population

• D. One bird in a flock migrates south

Tags

NGSS.MS-LS2-4

Which is the most accurate description of a population?

• One species of organisms living together

• A variety of species in one location

• All ecosystems combined

• All living and nonliving things in an area