Levels of Organization and Changes in Population

All the members of one species in a particular area is the definition of ____________.

• Ecosystem

• Community

• Population

• Organism

Levels of organization from largest to smallest are: Ecosystem -> Community -> Population -> Organism

• True

• False

What would be the result if the population of wild cats increased in this forest ecosystem?

• the population of rabbits and mice will decrease

• the population of goats and rabbits will increase

• the population of owls and snakes will increase

• The population of lions and jackals will decrease

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NGSS.MS-LS2-1

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How is this ecosystem MOST likely to be affected by an increase in the number of prairie dogs?

• There will be more food for mice

• The amount of grass will increase.

• The number of hawks will decrease.

• There will be more food for snakes.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

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What are the five levels of environmental organization, from largest to smallest?

• biosphere, ecosystem, community, population, organism

• ecosystem, biosphere, population, organism, community

• biosphere, population, ecosystem, community, organism

• biosphere, ecosystem, population, community, organism

Which statement BEST explains the flow of energy as it moves through the different levels?

• Energy decreases as it is lost as heat to the environment.

• Energy increases as it is gained from the environment.

• Energy is unavailable because it is used up by the organisms at Level 1.

• Energy is transferred as it is produced by organisms in the next level.

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NGSS.MS-LS2-3

Which level of organization includes all the living and non-living components in a particular area?

• A) Organism

• B) Population

• C) Community

• D) Ecosystem

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In a food chain, which level of organization does a single species of fish represent?

• A) Organism

• B) Population

• C) Community

• D) Ecosystem

What is the primary factor that causes changes in population size?

• A) Birth rate

• B) Death rate

• C) Immigration and emigration

• D) All of the above

Which of the following is an example of a population?

• A) All the fish in a lake

• B) All the lakes in a region

• C) All the plants in a forest

• D) All the animals in a zoo

Tags

NGSS.MS-LS2-4