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WorksheetsEcology Review
Total questions: 20
Worksheet time: 40mins
Which choice correctly lists the levels of biotic organization from simplest to most complex?
biosphere > ecosystem > community > population > organism
community > organism > biosphere > ecosystem > population
organism > population > community > ecosystem > biosphere
organism > community > biosphere > ecosystem > population
An environmental condition that influences the type and number of organisms in an ecosystem is a(n)
carrying capacity
biotic factor
competition
limiting factor
Buffalo, New York belongs to which biome?
temperate deciduous forest
desert
grasslands
coniferous forest
Which biome is characterized by the lowest levels of precipitation?
temperate deciduous forest
coniferous forest
grasslands
desert
Which biome is characterized by a lack of natural barriers, thin soil, high winds, and low precipitation?
temperate deciduous forest
coniferous forest
grasslands
desert
There are 250 rabbits per square kilometer in an area of Western New York. This number represents the rabbits'
carrying capacity
population density
predator-prey cycle
niche
The graph above represents the population growth of of a type of bacteria over several days. What is the carrying capacity of the bacteria in this ecosystem?
500
1000
1500
2000
The graph above represents a predator-prey cycle for wolves and rabbits in a certain ecosystem. Why does the rabbit population increase from about 17-20 years?
The wolf population had been steadily decreasing from around years 10-17.
The wolves stopped feeding on the rabbits.
The wolf population increased from years 10-17.
Disease killed off many of the wolves.
The graph above shows the population changes in 2 species of paramecium living in the same petri dish. Why does the population of P. caudatum decrease after day 6?
P. aurelia preys upon P. caudatum.
P. caudatum reached its carrying capacity at day 6.
The paramecium species were able to breed to produce a new type of paramecium.
The 2 species are in competition for resources, and P. caudatum was unsuccessful against P. aurelia in acquiring the necessary resources for survival.
An organism's habitat, food sources, and other factors specific to its way of life is the organism's
carrying capacity
niche
limiting factor
population
If the population of corn were to be wiped out by disease, what possible effect might this event have on the food web?
The grasshopper population would decline.
The python would have less prey options.
The rat population would decline.
All of the above.
What species in the food web above could be considered a tertiary consumer?
grasshopper
butterfly
wolf
lavender
In the energy pyramid above, assume the producers contain 10,000 kcal of energy. How much energy will be passed on to the tertiary consumers?
10,000 kcal
1,000 kcal
100 kcal
10 kcal
If only 10% of the energy from food eaten is stored as tissue in an organism, what happens to the rest of the energy?
It's used for metabolism.
It's eliminated as undigested food waste.
It's lost as heat to the environment.
All of the above.
Chemicals ________ in ecosystems and energy __________.
flow; cycles
flow; flows
cycle; flows
cycle; cycles
What two biological processes are involved in the cycling of carbon and oxygen?
transpiration and photosynthesis
cellular respiration and photosynthesis
cellular respiration and transpiration
nitrogen fixation and photosynthesis
What role(s) do(es) bacteria play in an ecosystem?
They "fix" atmospheric nitrogen into a form plants can use.
They break down dead and decaying organisms.
They break down nitrates and ammonia into nitrogen gas.
All of the above.
Farming helps to feed the world's growing population, but farm land reduces biodiversity in an area. This is an example of
conservation
trade-off
carrying capacity
biosphere
When toxins are released into waterways and taken in by organisms, these toxins can be passed on from one trophic level to another until organisms at the top of the food chain accumulate high levels. This is an example of
biological magnification
thermal pollution
global warming
loss of biodiversity
Emissions from factories and other uses of fossil fuels can end up in water, and thus lower the pH of soil and freshwater habitats, leading to many detrimental effects on the entire food chain. This is an example of the effects of
nuclear power waste management
thinning of the ozone layers
acid rain
thermal pollution
