Ecology Unit Review

The diagram above represents relationships in an

ecosystem. What is the primary source of energy in

this environment?

• cellular respiration in the plants

• energy from minerals in the soil

• fossil fuels

• solar energy

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NGSS.MS-LS1-6

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Mistletoe is an evergreen shrub that can produce most

of its own food. Often, mistletoe can be found living

on trees and taking water and nutrients away from the

tissues of the trees. The relationship between

mistletoe and trees is an example of

• consumer/herbivore

• predator/prey

• scavenger/decomposer

• parasite/host

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NGSS.MS-LS2-1

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What is one of the best ways to represent the

interdependence of all of the organisms in an

ecosystem?

• a cell model

• a food chain

• a diagram of the water cycle

• a food web

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Stability within an ecosystem is achieved partially by

the presence of organisms that break down important

molecules and make them available for other

organisms to use. These organisms are

• plants

• herbivores

• scavengers

• decomposers

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NGSS.MS-LS2-3

The diagram below represents an energy pyramid.

Which type of organism could occupy levels B, C,

and D of this energy pyramid?

• consumer

• producer

• autotroph

• carnivore

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NGSS.MS-LS2-3

Which human activity most directly causes a

significant increase in the amount of carbon dioxide

in the atmosphere?

• growing corn for food

• not using products containing plastics

• driving cars long distances

• planting large numbers of trees

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Producers are generally found at the beginning of a

food chain. Which statement best explains why this

is true?

• Producers are usually smaller in size than

  consumers.

• Producers do not rely on other organisms for

  food.

• There are always more consumers than

  producers in food chains.

• Consumers are always more complex

  organisms than producers.

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NGSS.MS-LS2-3

Base your answer to the question on the diagram

below and on your knowledge of biology. The

diagram represents trophic levels in an ocean

environment. The organisms found at the second

trophic level of this pyramid would be

• producers

• decomposers

• carnivores

• herbivores

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NGSS.MS-LS2-3

An invasive species, the spiny water flea, was

recently found in a New York lake. These water fleas

eat zooplankton, a food also consumed by native

fishes. The fleas spread from lake to lake by

attaching to fishing lines, anchor ropes, and boats.

Which statement best describes the effect of the

water flea on the lake?

• It will not compete with animals in the local

  food chain.

• It will feed on organisms that are important

  to other species.

• The number of water fleas will decrease due to

  a lack of food.

• There will be no effect on native species in the

  lake.

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NGSS.MS-LS2-1

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All green plants are

• Decomposers

• Consumers

• Producers

• Herbivores

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