Question 1

When withdrawal from an aquifer exceeds the rate of recharge, this is known as

Accepted Answer

A)   transpiration.
B)   negative hydrology.
C)   establishing a reservoir.
D)   increasing the transfer rate.
E)   groundwater mining.F) A) and C)
G) B) and C)

Question 2

The conversion of nitrate to nitrogen gas is achieved by

Accepted Answer

A)   denitrifying bacteria.
B)   leguminous bacteria.
C)   nitrogen-fixing bacteria.
D)   nitrate-producing fungi.
E)   nitrite-producing fungi.F) A) and E)
G) B) and E)

Question 3

In the following food chain, which organism is a secondary consumer? grass → rabbits → snakes → hawks → foxes

Accepted Answer

A)   grass
B)   rabbits
C)   snakes
D)   hawks
E)   foxesF) A) and C)
G) B) and E)

Question 4

How is a carnivore like an herbivore?

Accepted Answer

A)   Both pass on all energy received to the next trophic level.
B)   Both tend to produce nutrients for plants.
C)   Both pass on much less energy to the next trophic level than they received.
D)   Both are able to convert organic compounds to ATP without loss of energy.
E)   Both feed on detritus.F) C) and E)
G) B) and E)

Question 5

The two general categories of biogeochemical cycles are

Accepted Answer

A)   energy and matter.
B)   terrestrial and aquatic.
C)   gaseous and sedimentary.
D)   chemical and physical.
E)   organic and inorganic.F) B) and C)
G) A) and E)

Question 6

Fungi and bacteria are detritus-feeders, also known as

Accepted Answer

A)   omnivores.
B)   herbivores.
C)   decomposers.
D)   autotrophs.
E)   carnivores.F) None of the above
G) B) and D)

Question 7

Which organism eats only plant foods?

Accepted Answer

A)   omnivore
B)   herbivore
C)   decomposer
D)   autotroph
E)   carnivoreF) A) and D)
G) A) and E)

Question 8

How much of the water on Earth is fresh water?

Accepted Answer

A)   3%
B)   10%
C)   30%
D)   50%
E)   90%F) A) and B)
G) B) and C)

Question 9

You buy a house on a small inland lake and your front lawn ends at the water's edge. A lawn care company representative suggests you fertilize the lawn to keep it lush and green. You agree to the treatment and then, two weeks later, the lake is covered in green algae. The most likely cause of the algae problem is

Accepted Answer

A)   nitrogen.
B)   nitrites.
C)   sulfates.
D)   phosphates.
E)   carbon.F) C) and D)
G) A) and C)

Question 10

In a certain ecosystem, caterpillars eat grass. Field mice eat the caterpillars and seeds from the grass. Snakes eat the mice. Hawks eat both the snakes and mice. Such an arrangement would be considered a(n)

Accepted Answer

A)   food web.
B)   food chain.
C)   ecosystem.
D)   first trophic level.
E)   second trophic level.F) B) and E)
G) A) and D)

Question 11

When settlers move into a wooded area, they slash and burn the woods, increasing grass production. Initially, they are likely to see

Accepted Answer

A)   foxes increase.
B)   squirrels increase.
C)   grasshoppers increase.
D)   hawks decrease.
E)   grasshoppers decrease.F) A) and C)
G) B) and D)

Question 12

Explain the steps in the hydrological cycle.

Accepted Answer

Evaporation occurs, causing liquid water...

Question 13

Which statement about the hydrologic cycle is accurate?

Accepted Answer

A)   The cycle demonstrates that it is impossible to run out of fresh water for human use.
B)   Some water evaporates from land and from plants.
C)   All water molecules that evaporate from the ocean precipitate on land and move by gravity through groundwater to the ocean again.
D)   Once water sinks into the ground, it is safe from human exploitation or pollution until it has rejoined the ocean.
E)   The main source of water in the atmosphere is from evaporation over landmasses.F) A) and E)
G) None of the above

Question 14

What happens to the amount of available energy as you progress up the food pyramid?

Accepted Answer

A)   The amount of energy decreases.
B)   The amount of energy increases.
C)   The amount of energy stays the same.
D)   The amount of energy first decreases and then finally increases.
E)   Energy does not move from one trophic level to the next.F) B) and D)
G) A) and E)

Question 15

The base of an ecological pyramid represents the

Accepted Answer

A)   producer trophic level.
B)   primary consumer trophic level.
C)   secondary consumer trophic level.
D)   top predator trophic level.
E)   decomposer trophic level.F) A) and B)
G) All of the above

Question 16

Consider the components of a four-step food chain: producers, herbivores, carnivores, top predators. If everything is eaten at each level, how much of the energy stored by a producer is passed to the top predator?

Accepted Answer

A)   100%
B)   10%
C)   1%
D)   0.1%
E)   0.01%F) C) and D)
G) A) and D)

Question 17

Animals that feed on both plants and other animals are called

Accepted Answer

A)   herbivores.
B)   carnivores.
C)   omnivores.
D)   decomposers.
E)   detritivores.F) B) and E)
G) A) and C)

Question 18

Settlers move into an area and harvest most of the foxes for fur. They are likely to see

Accepted Answer

A)   hawks die out.
B)   squirrel populations increase.
C)   grasshopper populations increase.
D)   hawk populations immediately increase.
E)   grasshoppers decrease.F) B) and E)
G) C) and E)

Question 19

A disruption in which biogeochemical cycle will lead to cultural eutrophication?

Accepted Answer

A)   phosphorus
B)   carbon
C)   nitrogen
D)   hydrological
E)   All of the answer choices are correct.F) A) and E)
G) A) and D)

Question 20

An ecosystem consists of what two components?

Accepted Answer

A)   grazing and detritus food chains
B)   habitat and niches
C)   biotic and abiotic factors
D)   trophic and eutrophic factors
E)   water and temperatureF) A) and B)
G) B) and C)

Exam 35: Nature of Ecosystems

Consider the components of a four-step food chain: producers, herbivores, carnivores, top predators. If everything is eaten at each level, how much of the energy stored by a producer is passed to the top predator?

Correct Answer
verified

Which organism eats only plant foods?

Correct Answer
verified

When settlers move into a wooded area, they slash and burn the woods, increasing grass production. Initially, they are likely to see

Correct Answer
verified

How much of the water on Earth is fresh water?

Correct Answer
verified

In a certain ecosystem, caterpillars eat grass. Field mice eat the caterpillars and seeds from the grass. Snakes eat the mice. Hawks eat both the snakes and mice. Such an arrangement would be considered a(n)

Correct Answer
verified

Explain the steps in the hydrological cycle.

Correct Answer
verified
Evaporation occurs, causing liquid water...
View Answer

An ecosystem consists of what two components?

Correct Answer
verified

How is a carnivore like an herbivore?

Correct Answer
verified

The base of an ecological pyramid represents the

Correct Answer
verified

Correct Answer
verified

Settlers move into an area and harvest most of the foxes for fur. They are likely to see

Correct Answer
verified

What happens to the amount of available energy as you progress up the food pyramid?

Correct Answer
verified

Animals that feed on both plants and other animals are called

Correct Answer
verified

In the following food chain, which organism is a secondary consumer? grass → rabbits → snakes → hawks → foxes

Correct Answer
verified

When withdrawal from an aquifer exceeds the rate of recharge, this is known as

Correct Answer
verified

A disruption in which biogeochemical cycle will lead to cultural eutrophication?

Correct Answer
verified

Fungi and bacteria are detritus-feeders, also known as

Correct Answer
verified

Which statement about the hydrologic cycle is accurate?

Correct Answer
verified

The two general categories of biogeochemical cycles are

Correct Answer
verified

The conversion of nitrate to nitrogen gas is achieved by

Correct Answer
verified

Exam 35: Nature of Ecosystems

Consider the components of a four-step food chain: producers, herbivores, carnivores, top predators. If everything is eaten at each level, how much of the energy stored by a producer is passed to the top predator?

Correct AnswerverifiedShow Answer

Which organism eats only plant foods?

Correct AnswerverifiedShow Answer

When settlers move into a wooded area, they slash and burn the woods, increasing grass production. Initially, they are likely to see

Correct AnswerverifiedShow Answer

How much of the water on Earth is fresh water?

Correct AnswerverifiedShow Answer

In a certain ecosystem, caterpillars eat grass. Field mice eat the caterpillars and seeds from the grass. Snakes eat the mice. Hawks eat both the snakes and mice. Such an arrangement would be considered a(n)

Correct AnswerverifiedShow Answer

Explain the steps in the hydrological cycle.

Correct AnswerverifiedEvaporation occurs, causing liquid water...View AnswerShow Answer

An ecosystem consists of what two components?

Correct AnswerverifiedShow Answer

How is a carnivore like an herbivore?

Correct AnswerverifiedShow Answer

The base of an ecological pyramid represents the

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Settlers move into an area and harvest most of the foxes for fur. They are likely to see

Correct AnswerverifiedShow Answer

What happens to the amount of available energy as you progress up the food pyramid?

Correct AnswerverifiedShow Answer

Animals that feed on both plants and other animals are called

Correct AnswerverifiedShow Answer

In the following food chain, which organism is a secondary consumer? grass → rabbits → snakes → hawks → foxes

Correct AnswerverifiedShow Answer

When withdrawal from an aquifer exceeds the rate of recharge, this is known as

Correct AnswerverifiedShow Answer

A disruption in which biogeochemical cycle will lead to cultural eutrophication?

Correct AnswerverifiedShow Answer

Fungi and bacteria are detritus-feeders, also known as

Correct AnswerverifiedShow Answer

Which statement about the hydrologic cycle is accurate?

Correct AnswerverifiedShow Answer

The two general categories of biogeochemical cycles are

Correct AnswerverifiedShow Answer

The conversion of nitrate to nitrogen gas is achieved by

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Evaporation occurs, causing liquid water...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified