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I EcologyPretest

1. If two species are dependent upon each other for existence, then the symbiotic relationship is called

A. CommensalismB. ParasitismC. MutualismD. Competition

2. The movements of energy and nutrients through living systems are different because

A. Energy flows in one direction and nutrients recycle

B. Energy is limited in the biosphere and nutrients are always available

C. Nutrients flow in one direction and energy recycles

D. Energy forms chemical compounds and nutrients are lost as heat

3. Taking the following aquatic food chain into consideration what would most likely result if waterborne bacteria caused the death of most of the minnow population?

Algae Zooplankton Minnow Perch Hawk

A. Decrease in both algae and zooplankton populationB. Increase in both zooplankton and perch populationC. Increase in both perch and hawk populationD. Decrease in both perch and hawk population

4. What organisms aid in returning nitrates (nitrogen compounds) found in living tissues to the atmosphere as N2 gas?

A. Nitrogen fixing bacteriaB. Denitrifying bacteriaC. ConsumersD. Plants

5. Which biome has the highest levels of biodiversity in the world?

A.TundraB. Boreal forest (Tiaga)C. DesertD.Rainforest

6. The total mass of living tissue at each trophic level can be shown in a(n)

A. Energy pyramidB. Pyramid of numbersC. Biomass pyramidD. Biogeochemical cycle

7. Which of the following are examples of abiotic factors

A.RiverB. ElephantC. LavaD.Both A and C

8. What type of succession depends on lichens?

A. PrimaryB. SecondaryC. Both primary and secondaryD. Neither primary or secondary

9. What would result if the spiders were removed from the food web shown?

A. The competition between the snakes and hawks and owls would decrease

B. The number of toads and foxes would increase

C. The number of insectivorous birds and predaceous insects would increase

D. The number of herbivorous insects would increase and the number of plants would decrease.

10.Which breaks down dead organisms?

A. Food WebB. Food ChainC. DecomposerD. Scavenger

EcologyPretest KEY

1. If two species are dependent upon each other for existence, then the symbiotic relationship is called

A. CommensalismB. ParasitismC. MutualismD. Competition

2. The movements of energy and nutrients through living systems are different because

A. Energy flows in one direction and nutrients recycleB. Energy is limited in the biosphere and nutrients

are always availableC. Nutrients flow in one direction and energy recyclesD. Energy forms chemical compounds and nutrients

are lost as heat

3. Taking the following aquatic food chain into consideration what would most likely result if waterborne bacteria caused the death of most of the minnow population?

Algae Zooplankton Minnow Perch Hawk

A. Decrease in both algae and zooplankton populationB. Increase in both zooplankton and perch populationC. Increase in both perch and hawk populationD. Decrease in both perch and hawk population

4. What organisms aid in returning nitrates (nitrogen compounds) found in living tissues to the atmosphere as N2 gas?

A.Nitrogen fixing bacteriaB. Denitrifying bacteriaC. ConsumersD.Plants

5. Which biome has the highest levels of biodiversity in the world?

A. TundraB. Boreal forest (Tiaga)C. DesertD. Rainforest

6. The total mass of living tissue at each trophic level can be shown in a(n)

A. Energy pyramidB. Pyramid of numbersC. Biomass pyramidD. Biogeochemical cycle

7. Which of the following are examples of abiotic factors

A.RiverB. ElephantC. LavaD.Both A and C

8. What type of succession depends on lichens?

A. PrimaryB. SecondaryC. Both primary and secondaryD. Neither primary or secondary

9. What would result if the spiders were removed from the food web shown?

A. The competition between the snakes and hawks and owls would decrease

B. The number of toads and foxes would increase

C. The number of insectivorous birds and predaceous insects would increase

D. The number of herbivorous insects would increase and the number of plants would decrease.

10. Which breaks down dead organisms

A. Food WebB. Food ChainC. DecomposerD. Scavenger

Grading Scale

Number of Q’s Missed Test Score

1 90

2 80

3 70

4 60

5 50

6 40

7 30

8 20

9 10

10 0