Question 1
Question
Nitrogen is taken from the atmosphere and converted into a form usable by plants through a process called
Answer
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nitrification
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nitrogen fixation
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assimilation
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ammonification
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denitrification
Question 2
Question
Which of the following is NOT recycled in an ecosystem forever?
Answer
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carbon
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water
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energy
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nitrogen
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phosphorus
Question 3
Question
An organism's niche includes
Question 4
Question
The complex of interconnected food chains in an ecosystem is known as
Answer
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trophic levels
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a food web
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a biogeochemical cycle
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succession
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energy flow
Question 5
Question
An example of commensalism is
Answer
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mistletoe living on a host plant
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an epiphyte growing on a tree
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mycorrhize
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ants and flowering vines in Central America
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a bacterium living on a dead leaf
Question 6
Question
A Type III survivorship curve would be observed
Answer
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in humans
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in annual plant populations crowded into a limited space
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when mortality is concentrated later in life
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in many tree species because many young seedlings die
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when the probability of death is equally likely at any age
Question 7
Question
A goat pulling a plant out of the ground to eat is an example of
Answer
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parasitism
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predation
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competition
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commensalism
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mutualism
Question 8
Question
Which of the following organisms would be found at the base of a pyramid of energy?
Answer
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an herbivore
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a primary consumer
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a secondary consumer
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an omnivore
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a producer
Question 9
Question
Which contains the largest number of organisms?
Answer
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community
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ecosystem
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population
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biosphere
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landscape
Question 10
Question
When you observe the growth rate of a population decreasing to zero, you can conclude that
Answer
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all individuals in the population have died
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the species has become extinct
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the growth curve of the population has a J-shape
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conditions are optimal
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the carrying capacity of the environment has been reached
Question 11
Answer
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primary consumers
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secondary consumers
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detritivores
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omnivores
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producers
Question 12
Question
A plant defense mechanism to escape predation includes
Answer
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thorns
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spines
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a thick waxy cuticle
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bad tasting chemicals
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all of these
Question 13
Question
Two important decomposers are
Answer
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bacteria and fungi
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vultures and snails
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snails and clams
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bears and pigs
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oaks and maples
Question 14
Question
Intraspecific competition
Answer
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tends to limit the population size
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usually results in one species being eliminated from an area
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is not a significant factor in communities
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includes predation and parasitism
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is the same as predation
Question 15
Question
Which biome is characterized by thickets of evergreen shrubs and small trees?
Question 16
Question
What is most important for determining a biome's boundaries?
Question 17
Question
Hot summers and pronounced winters, moderate to high rainfall, and a dense canopy of broad-leaved trees over saplings and shrubs characterize the ____ biome.
Question 18
Question
Which biome is characterized by rich topsoil and broadleaf trees that lose their leaves in winter?
Question 19
Question
Which biome is characterized by permafrost?
Question 20
Question
High precipitation, cool summers, mild winters, and an evergreen forest characterize the biome.
Question 21
Question
Mediterranean biome is affected by _________ air currents in summer.
Answer
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ascending wet
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clockwise turning
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descending wet
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ascending dry
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descending dry
Question 22
Question
Which biome am I? I am found along the northwest coast of North America and have coniferous evergreen trees.
Answer
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boreal forest
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chaparral
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temperate rain forest
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tropical rain forest
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grassland
Question 23
Question
The biome that can have enormous fluctuations of daily and seasonal temperatures is the
Question 24
Question
Which biome is characterized by conifers and extremely cold winters?
Question 25
Question
Hot summers and cool to cold winters, low to moderate precipitation, and the best agricultural soils in the world characterize the ____ biome.
Question 26
Question
Which of following statements is correct?
Answer
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Swamps are fulfilled with grass.
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There are a lot of conifers in marshes.
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Benthic zone is dominated by zooplanktons in ocean.
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Estuaries and delta regions have very high primary productivity.
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Rivers are stablized ecosystems.
Question 27
Question
Which biome am I? The weather is cool, and there is high precipitation and dense fog.
Answer
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deciduous forest
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chaparral
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temperate rain forest
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tropical rain forest
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savanna
Question 28
Question
These two biomes are dominated by conifers:
Answer
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tundra and taiga
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boreal forest and temperate rain forest
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temperate rain forest and tropical rain forest
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chaparral and savanna
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temperate deciduous forest and temperate rain forest
Question 29
Question
Today, the extinction of most species is due to
Question 30
Question
A threatened species is different from an endangered species in that a threatened species
Answer
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is composed of individuals that cannot interbreed
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is in imminent danger of extinction
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is likely to become endangered in the near future
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lives outside its range
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has already become extinct
Question 31
Question
By definition, an area providing ecosystem services
Answer
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is a hotspot
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is important to the functioning of the ecosystem as a whole
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is an example of in situ conservation
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is an example of ex situ conservation
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is undergoing restoration ecology
Question 32
Question
Global warming occurs because greenhouse gases
Question 33
Question
Which of the following statements concerning invasive species is FALSE?
Answer
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they may compete with native species for resources
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they may prey on native species
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they may cause economic harm
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they usually cause less harm to the native species than natural predators
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they may spread to new areas on their own
Question 34
Question
The most effective way to preserve species is to
Answer
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divide areas into fragments having separate species
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divide areas into fragments that are far apart rather than close together
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preserve habitats that have only a few species rather than many species
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build roads in order to more easily access species
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establish parks and reserves
Question 35
Question
Species richness is defined as
Answer
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the number of species
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the genetic variety within a population
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the genetic variety within a species
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the diversity among ecosystems
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biodiversity
Question 36
Question
Increases in the amount of ____ in the atmosphere may be a threat to the world because of the greenhouse effect.
Answer
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carbonate
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carbon dioxide
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helium
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nitrogen gas
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none of these
Question 37
Question
Which of the following is NOT classified as a greenhouse gas?
Answer
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molecular nitrogen (N2)
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surface ozone (O3)
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carbon dioxide (CO2)
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nitrous oxide (N2O)
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methane (CH4)
Question 38
Question
Which of the following is NOT a probable consequence of global warming?
Answer
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some species will disperse into new environments
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Canada and Russia will decrease their agricultural productivity
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some areas will have increased precipitation
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some areas will have increased droughts
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sea levels will rise
Question 39
Question
Which of the following is NOT a characteristic of endangered species?
Answer
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they have an extremely localized range
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they have low reproductive rates
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they have specialized feeding habits
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they live on islands
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they are not endemic
Question 40
Question
Ex situ conservation
Answer
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is the best way to preserve biodiversity
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is exemplified by a national park
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is exemplified by a national reserve
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is exemplified by a marine sanctuary
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is exemplified by a botanic guarden