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WorksheetsUnit 1 Ecology
Total questions: 32
Worksheet time: 17mins
A group of organisms of the same species that live in the same area is called a(n)
organism
population
community
ecosystem
Herbivores are which of the following?
producer
primary consumer
secondary consumer
tertiary consumer
Which of the following provide most of the energy in ecosystems?
keystone species
carnivores
generalist
producers
An organism that has an unusually large effect on an ecosystem is called a(n)
keystone species
omnivore
biotic factor
heterotroph
Which two processes in the carbon cycle are also parts of the oxygen cycle?
combustion
photosynthesis
respiration
decay
Which process is part of the hydrologic cycle?
nitrification
transpiration
decomposition
sedimentation
Which of the following can be both primary and secondary consumers?
producers
herbivores
carnivore
omnivore
Bacteria are important in the nitrogen cycle because they
convert nitrogen
respire returning carbon dioxide to the atmosphere
decay to form fossil fuels
produce sugars
What are two processes by which autotrophs make food?
decomposition
photosynthesis
respiration
chemosynthesis
If a keystone species is removed from an ecosystem,
biotic factors are effected
abiotic factors are effected
biotic AND abiotic factors are effected
No factors are effected
Which of the following will increase the size of a population?
birth
death
immigration
emigration
Which of the following is a density-dependent limiting factor?
natural disaster
unusual weather
human activities
competition
What type of population growth is shown in a graph that has a "J" curve?
logistic
exponential
density dependent
carrying capacity
Pioneer species are the first
mature trees
deciduous trees
grasses and lichen
shrubs
The European red squirrel population is declining due to competition with the North American gray squirrel. Most likely, what will eventually happen to the red squirrel?
It will win the competition
It will mate with the gray squirrel
It will go extinct
It will move to a new community with less competition
In 1988 several large forest fires occurred in Yellowstone National Park. What process occurred after these fires?
primary succession
secondary succession
climax community
ecosystem community
Which of these is a density-independent limiting factor?
increase in population
introduction of a parasite
decrease in predators
earthquake
Parasitism is most similar to
interspecific competition
mutualism
commensalism
predation
The new island of Surtsey was formed near Iceland by a series of volcanic eruptions. Which of these processes occurred first on Surtsey?
a complex ecosystem was formed
lichen broke down volcanic rock
plants grew on the island
animal moved to the island
Which level of the food chain is most affected by biomagnification?
producers
primary consumer
secondary consumer
tertiary consumer
Increasing the biodiversity of an ecosystem would be likely to
cause species to go extinct
reduce the number of species
increase the stability of the ecosystem
decrease the stability of the ecosystem
A native predator might control an invasive species by
keep the invasive species from increasing in numbers
increase the niches
cause habitat fragmentation
reduce biodiversity
In what biome is biodiversity the highest?
temperate forest
grasslands
tropical rain forest
deserts
How has the introduction of kudzu affected native species in the southeastern United States?
increase erosion
attract animals
help native plants
cover native plants
Burmese pythons introduced in the Everglades could become a threat to
native species
humans
water quality
kudzu
Because the manatee is an umbrella species, protecting it may lead to
pollution of waterways
decreased sea grass
increased boating
protection of many species
Which groups of organisms most often serve as indicator species?
large mammals
amphibians
primates
plants
What are Non-Renewable resources?
Resources that are used faster than they are formed.
Resources that are formed millions of years ago.
Resources that replenish themselves overtime.
Resources found in rural areas.
Which of the following best describes renewable resources?
Resources that are used faster than they are formed.
Resources that are formed over millions of years ago.
Resources that only exist in rural areas.
Resources that can replenish themselves overtime.
Without the greenhouse effect the earth would be?
Too cold to sustain life
Too hot to sustain life
The earth would be fine
Just a little too cold
Sunlight and pollutants from _____ are factors that produce smog
acid rain
fossil fuels
the answer is NOT acid rain
nitrogen
Scientist agree that changes in the atmospheric gases may?
harm the geosphere only
help the geosphere
not affect the global biosphere
harm the global biosphere
