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1
Which of the following is a decomposer?
A)snakes
B)mice
C)bacteria
D)deer
2
Organisms in trophic level 3 are _______________.
A)detritivores.
B)herbivores.
C)carnivores.
D)producers.
3
Which of the following are producers?
A)termites
B)bacteria
C)algae
D)grasshoppers
4
The greatest variety of organisms in the oceans occurs in the _____________.
A)shallow water.
B)open sea surface.
C)deep sea water.
D)profundal zone.
5
Which one of the following is not a biome?
A)taiga
B)tundra
C)desert
D)estuary
6
At least half of the terrestrial plants and animals occur in which biome?
A)savanna
B)grassland
C)deciduous forest
D)rain forest
7
Which of the following is a difference between a food chain and a food web?
A)Food chains involve only plants, while food webs involve animals.
B)Food chains involve only plants, while food webs involve both plants and animals.
C)Food chains involve plants and animals, but food webs involve only animals.
D)Food chains are linear and food webs are complex.
E)Food chains include decomposers, but food webs do not.
8
The carnivores are classified as secondary consumers because they eat __________________.
A)more than one species of herbivore.
B)herbivores or other carnivores.
C)herbivores.
D)so often.
E)both a and d
9
The vast majority of energy taken into an ecosystem is ____________.
A)converted into biomass by plants.
B)utilized by secondary consumers.
C)lost as heat.
D)used by the primary consumers.
E)concentrated in the decomposers.
10
The sun drives the circulation of the atmosphere causing rain in the deserts and a band of tropics at 30 degrees latitude.
A)True
B)False
11
A rain shadow is likely to develop ___________________.
A)in almost any very hot climate.
B)at elevations exceeding 4,500 ft.
C)on the leeward side of a mountain.
D)on the north slope of a mountain.
E)near the equator.
12
Ecology is the study of _____________.
A)how organisms interact with their environment.
B)where we live.
C)how organisms interact with each other.
D)the different environments in the world.
E)all of the above
13
The biomass of primary producers tend to be greater than that of the herbivores that consume them but herbivore biomass tends to be less than the biomass of the predators that consume them.
A)True
B)False
14
Water cycles through ecosystems in the atmosphere via precipitation and evaporation with some of it passing through plants on the way.
A)True
B)False
15
Groundwater is the water that sits on the surface of the ground and makes up more than 96% of the freshwater in the U.S.
A)True
B)False
16
Carbon captured from the atmosphere by photosynthesis is returned to it through respiration, combustion, and diffusion.
A)True
B)False
17
A lake can be "killed" by the addition of too much phosphorous.
A)True
B)False
18
Primary productivity refers to the total weight of all ecosystem organisms.
A)True
B)False
19
In the earth's ecosystems, energy ___________________.
A)is recycled and is never really lost.
B)flows from producers to consumers and back to producers.
C)flows in one direction, from producers to consumers.
D)is produced at all trophic levels.
E)both a and d
20
A consequence of cutting down forests is ___________________.
A)that water is no longer returned to the atmosphere over the area of the forest.
B)the loss of animal habitats.
C)the production of high-quality agricultural land.
D)all of the above
E)both a and b





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