8th Grade Final Exam B Review 2023-24

Which type of organism is found at the top of an energy pyramid representing an ecosystem?

• Consumer

• Decomposer

• Prey

• Producer

Tags

NGSS.MS-LS2-3

A coral animal builds a hard shell to live in and a tiny algae (the zooxanthellae ) lives with the coral animal. The zooxanthellae gets a safe place to live and the coral gets additional nutrients created by the algae. What kind of symbiosis is this?

• Parasitism

• Commensalism

• Mutualism

• Competition

Ceratocystis fagacearum is a plant that lives on Oak trees, stealing their nutrients. What term best describes the relationship between Ceratocystis fagacearum and Oak trees?

• Mutualism

• Comnmensalism

• Competition

• Parasitism

Tags

NGSS.MS-LS2-2

According to the food web above, which organism(s) prey on the crayfish?

• raccoon and muskrat

• trout, muskrat and beaver

• watercress and cattails

• only raccoons

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

Decomposers break down fallen leaves on the forest floor. When they do this, they release carbon dioxide into the atmosphere and nitrogen to the soil. Which of the following organisms would most likely be decomposers?

• bacteria and mold

• deer

• grasses

• mountain lions

Tags

NGSS.MS-LS2-3

Refer to the table titled "Australian Animal Ranges and Food Sources" for this question. Which of these species would be most in danger of becoming extinct if one of their food sources became unavailable?

• Bilbie

• Red Kangaroo

• Mala

• Koala

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which of the following are abiotic factors that organisms could compete for in an ecosystem? Select TWO correct answers.

• Soil

• Sunlight

• Animals

• Temperature

• Plants

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NGSS.MS-LS1-5

Refer to the food web diagram provided. Which of the organisms in the food web receive energy from the mouse? Select TWO correct answers.

• the grasshopper

• the prairie grass

• the snake

• the antelope

• the hawk

Tags

NGSS.MS-LS2-3

According to the food web shown in the diagram, what would be the MOST LIKELY outcome if all of the mountain lions were removed from this ecosystem? Select TWO correct answers.

• The deer population would increase due to the lack of predation.

• The deer population would increase due to the lack of predation and the raccoon population would decrease because they lost their only food source.

• The turtle population would increase due to the lack of predation.

• The shrub population would decrease due to the lack of predation on the deer population.

• The egret population would increase due to the lack of predation.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

According to the graph, what species has been negatively affected the most by the removal of the mature trees?

• spotted owls

• grey squirrels

• holly ferns

• hawk

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4