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Post-Test
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1
The____________ is the area where organisms interact with each other and with the abiotic environment.
A)community
B)biosphere
C)niche
D)ecosystem
2
The role of an organism within the ecosystem is its ________.
A)niche
B)habitat
C)food chain
D)trophic level
3
All the organisms that feed at a particular link in a food chain are called a ____________.
A)trophic level
B)food web
C)pyramid of numbers
D)detrital food chain
4
____________ moves water from surface supplies to the atmosphere in the hydrologic cycle?
A)Precipitation
B)Gravity
C)Condensation
D)Evaporation
5
Global warming, caused by a buildup of greenhouse gases, will likely have what effect in the future?
A)greater occurrence of droughts
B)reduced agricultural yields
C)glacier melt and rising sea levels
D)All of these are correct.
6
Biomes are defined by ____________ and ______________.
A)plants, animals
B)rainfall, lighting
C)temperature, rainfall
D)temperature, lighting
7
In the ______________ a variety of grazing animals will be found.
A)tundra
B)tropical rain forest
C)savanna
D)taiga
8
____ are the producers of food from inorganic nutrients and an outside energy source.
A)Heterotrophs
B)Decomposers
C)Consumers
D)Autotrophs
9
The richest marine ecosystems can be found
A)near the coasts.
B)in the open ocean.
C)in the benthic region.
D)in the pelagic region.
10
Which of the following is considered a detritus feeder?
A)Earthworms
B)Caterpillars
C)Hawks
D)Diatoms
11
Humans are considered ____________.
A)carnivores
B)autotrophs
C)omnivores
D)herbivores
12
Energy cannot cycle through an ecosystem because
A)it starts with but cannot return to the sun.
B)too much is lost as heat.
C)too much is needed to make food.
D)None of the above.
13
Bacteria and fungi are decomposers because they
A)live on the elements directly.
B)are parasites.
C)live on dead organic material.
D)eat living plant material.
14
Various interconnecting parts of energy flow are represented by a:
A)food web
B)food pyramid
C)food chain.
D)All of the above.
15
All of the organisms that feed at a particular link in the food chain comprise a ____________.
A)biome
B)link
C)niche
D)tropic level
16
Why do most food chains consist of no more than four or at most five trophic levels?
A)Animals mostly graze plants and there are few actual carnivores in nature.
B)There is a significant loss of energy at each level.
C)It is difficult for ecologists to accurately determine feeding level.
D)All of these are correct.
17
An ecological pyramid illustrates that
A)carbon dioxide is lost in the ecosystem.
B)water is lost in the ecosystem.
C)useful energy is lost in the ecosystem.
D)nitrogen is lost in the ecosystem.
18
The phosphorus cycle is a _____________ biogeochemical cycle.
A)gaseous
B)sedimentary
C)aquatic
D)inorganic
19
The process of nitrification can occur
A)in the atmosphere as high energy converts nitrogen gas to nitrate.
B)in the atmosphere as bacteria convert nitrogen gas to nitrate.
C)in the soil as bacteria convert ammonium ions to nitrite ions, then to nitrate.
D)Both 1 and 3 are correct.
20
Which of the following is not a reservoir for carbon?
A)oceans
B)forests
C)atmosphere
D)dead organisms





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