U7 STUDY GUIDE//REVIEW

The graph below represents a population of deer in a certain area. Which statement below is the most likely description for what will happen when a predator of deer is introduced to the area?

• The deer population will decrease to 0.

• The deer population will remain near 450.

• The deer population will increase beyond 500.

• The deer population will decrease below 450.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

In a certain part of forest, wolves primarily hunt for deer. What will happen to both populations if a deadly disease spreads through the deer population?

• wolf population decreases, deer population decreases

• wolf population increases, deer population decreases

• wolf population decreases, deer population increases

• wolf population increases, deer population increases

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Layla was discussing relationships of organisms with her friend Lucy. Layla stated that competitive relationships only occur between organisms of the same species. Lucy said that competitive relationships can also occur between two different types of species. Which best explains who is correct?

• Layla is correct because only organisms within the same species compete for similar resources.

• Layla is correct because only organisms within the same species live in similar environments.

• Lucy is correct because organisms of different species may compete for the same resources.

• Lucy is correct because organisms of different species always share a similar environment.

Tags

NGSS.MS-LS2-2

Jim set up a birdhouse on his front porch. Which of the following is most likely to happen?

• The number of cats around the porch will decrease.

• The number of birds around the house will decrease.

• The number of insects around the porch will decrease.

• The number of squirrels around the porch will decrease.

Tags

NGSS.MS-LS2-4

The energy that gets to the top-level consumers originally comes from

• the Sun.

• the water.

• the producers.

• the decomposers.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

The graphic below is of an energy pyramid. Which statement correctly describes the flow of energy in this energy pyramid?

• Most of the energy is transferred from the producers to the primary consumers.

• Most of the energy is transferred from the secondary consumer to the tertiary consumer.

• The least amount of energy is transferred from the producers to the primary consumers.

• The least amount of energy is transferred from the secondary consumer to the tertiary consumer.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Why is the flow of energy within a food web complex?

• Most organisms are consumed by more than one species of organisms.

• The usable energy decreases with each subsequent lower feeding level.

• The greatest amount of energy lies at the higher-level consumer.

• Most organisms eat only one type of food within their own ecosystem.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which statement BEST describes what happens to the matter in an ecosystem?

• The matter is recycled as it moves through the food web.

• The matter is created by organisms as it travels through the food web.

• The matter is consumed by organisms as it travels through the food web.

• The matter is destroyed after it is eaten by the organisms in the food web.

Tags

NGSS.MS-LS2-3

The picture shows a food web in the mountains of Georgia. Which best describes the organisms that would recycle decaying matter back into the mountain ecosystem?

• The mushrooms because they are decomposers and break down matter to return to the ecosystem.

• The Sun because it provides all the energy required for the organisms to return matter to the ecosystem.

• The deer because they are consumers and break down the matter from producers to return to the ecosystem.

• The berries and flowers because they are producers and are broken down for multiple consumers in the ecosystem.

Tags

NGSS.MS-LS2-3

Many small fish hide from predators in the roots of mangrove trees that grow along the shoreline. The mangrove trees are not affected by the fish. Which type of species interaction is exemplified in this situation?

• predation

• mutualism

• parasitism

• commensalism

Tags

NGSS.MS-LS2-2