Ecology Test 1 Review

An ecosystem can support a population of 1,500 frogs. What will happen if the number of frogs increase to 2,750?

• The frog population will decline sharply.

• The frog population will continue to increase.

• The frog will become stable at 2,750.

• The frog population will have a lower death rate.

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NGSS.MS-LS2-1

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What element of a desert biome is abiotic?

• cactus

• fungus

• lizard

• sand

The diagram shows a forest environment and several organisms that live there.

If rainfall in the area is less than expected, what is the most likely result on the ecosystem?

• More deer and rabbit will immigrate into the area.

• Water will become a limiting factor for all organisms.

• The birth rate will increase for the rabbit and bird population.

• The organisms will adapt in order to survive with less water.

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NGSS.MS-LS2-1

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Which organism is a link between an aquatic food web and a terrestrial food web?

• clam

• dolphin

• penguin

• shark

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A connection between terrestrial and aquatic food webs is best explemified by which pair of animals?

• dolphins and fish

• lions and gazelles

• pelicans and fish

• spiders and flies

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NGSS.MS-LS2-2

Many humans eat both plants and animals. Which term describes humans who fulfill this role in a food web?

• consumers

• decomposers

• producers

• scavengers

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NGSS.MS-LS2-2

A student makes a model to demonstrate a functioning ecosystem by filling a glass jar with water and adding two goldfish and two butterfly fish. The student’s teacher says that the model could be improved.

What should the student do to improve the model?

Responses

• The student should add more goldfish or butterfly fish to the jar.

• The student should keep the glass jar in sunlight.

• The student should change the water of the jar daily.

• The student should add small rocks and aquatic plants to the jar.

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Examine the food web with organisms W, X, Y and Z indicated.

Which organism could be classified as heterotrophs?

• W and X

• W and Y

• W and Z

• X and Z

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NGSS.MS-LS2-3

A mouse eats grasshoppers that feed on plants. An incomplete energy pyramid is shown.

At which level do the grasshoppers belong in the energy pyramid?

• level P

• level Q

• level R

• level S

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NGSS.MS-LS2-3

How could plants be described?

• autotrophs and consumers

• autotrophs and producers

• heterotrophs and consumers

• heterotrophs and photosynthesizers

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NGSS.MS-LS2-3

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