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WorksheetsDual Biology 2 Ch 20-22 Unit 4 test
Total questions: 73
Worksheet time: 45mins
The total number of wolves inhabiting Isle Royale is defined as a _____.
species
community
population
group
pack
A report that documents all the species (plants and animals) in an area but does not include the environment describes
the ecological niche of each species.
a habitat.
a population.
a community.
a biome.
The ocean, sand, rocks, plants, seagulls, and invertebrates represent a(n)
individual.
population.
community.
ecosystem.
biosphere.
21. Why do ecologists count representative samples of a population and not the total population under study?
to get a precise number
because it is impractical to count all the members of the population
because it is the way that ecologists study ecosystems
to get an estimate before counting the whole population
because a representative sample more accurately reflects the carrying capacity
Which population distribution pattern is encountered most often by ecologists?
random
clumped
uniform
irregular
Which population would most likely resemble a uniform distribution pattern?
humans in North America
penguins nesting in Antarctica
wolves in Isle Royale
termites in a rainforest
understory plants in a tropical rainforest
A plant with wind-dispersed seeds is most likely to grow in a ____ distribution.
random
linear
spherical
clumped
uniform
Which of these would NOT be useful in assessing a population’s health?
A) urine
B) bone remains
C) fecal remains
D) radio transmitters
E) blood spatter
urine
bone remains
fecal remains
radio transmitters
blood spatter
What information could be obtained from wolf scat?
DNA profiles
vegetation preference
presence of arthritis
amount of urea
time since last meal
Scat is _____.
a parasite found on wolves
a species of mite
feces
urine
blood
When a population reaches its carrying capacity, its growth rate will
increase exponentially.
increase arithmetically.
slow and remain near zero.
decrease slowly.
decrease rapidly.
The growth rate of a population is calculated from the ___ for that population.
A)
B)
C)
D)
E)
carrying capacity
difference between births and deaths
birth rate
death rate
birth rate and the carrying capacity
The best example of exponential population growth would be an increase of _____ per generation.
10 individuals
10%
10X (tenfold)
a variable rate, from 1.5X to 10X
All of the answers are correct.
Which of the following conditions would lead to the fastest population growth?
birth rate = death rate; immigration = emigration
birth rate = death rate; immigration > emigration
birth rate > death rate; immigration > emigration
birth rate > death rate; emigration > immigration
birth rate > death rate; immigration = emigration
Carrying capacity is the _____.
number of individuals in a given area
total biomass of a given area
maximum number of individuals of a population that an area can support
total plant biomass minus the animal biomass in a given area
All of the choices are correct
A decrease in natural resources will ____.
increase the carrying capacity
stimulate an increase in reproductive rate
cause a reduction in habitat area
decrease the carrying capacity
eliminate the population
The prey species on Isle Royale is the
moose.
wolf.
fox.
ravens.
caribou.
An increase in predator numbers is usually followed by a subsequent
decrease in predator numbers.
decrease in prey numbers.
increase in prey numbers.
extinction of prey.
extinction of predators.
Which of the following most accurately describes the population cycles of moose and wolves on Isle Royale?
Moose and wolf populations stay at carrying capacity.
Moose populations stay at carrying capacity, while wolf populations rise and fall.
Moose populations rise and fall, while wolf populations stay at carrying capacity.
Moose and wolf populations rise and fall at the same time.
Moose and wolf populations rise and fall, but wolf populations peak a few years after the moose population peaks.
In the absence of a predator species, herbivores like moose _____.
will continue to have an exponential growth rate
will almost always die off because of the presence of density-dependent diseases
may exceed carrying capacity and have a fast die-off
will evolve to no longer require predators to balance their population size
may eventually become omnivores
Removal of a predator from an ecosystem may do all of the following, EXCEPT
affect prey populations.
allow prey populations to remain above carrying capacity.
alter the vegetation of an ecosystem.
affect the ecosystem balance.
have unintended negative results.
A decrease in the predator population that consumes herbivorous animals will cause ____.
a decrease in food plant populations
some food plant populations to explode out of control
a general increase in food plant populations
a loss of species diversity
an increase in species diversity
Which is NOT an abiotic factor that could affect a population?
breeding places
precipitation
temperature
vegetation
habitat
Corona virus is a
density dependent factor.
density independent factor.
density dependent and independent factor.
None of the choices are correct.
Tornadoes that hit the cities in Tennessee is a
density dependent factor.
density independent factor.
density dependent and independent factor.
None of the choices are correct.
Which is NOT a result of climate change affecting the predator/prey relationships of Isle Royale?
The moose population has decreased.
The wolf population has decreased.
The tick population has decreased.
The moose population has been weakened by ticks.
The moose population has been weakened by ticks.
A decrease in which keystone species has recently impacted agriculture in North America, Europe, and Asia?
bats
bees
birds
ants
humans
What makes an organism a keystone species?
Its loss would increase the population of other species.
It is important for pollination.
Its loss would negatively impact the community and ecosystem.
It is important for the survival of angiosperms.
It is the most abundant species in a community.
Why are angiosperms important to honey bees?
They are a keystone species.
Pollen is a food source.
Flowers are a source of food.
The cones are sources of nectar and pollen.
All of the answers are correct.
Which crop relies exclusively on honey bee pollination? Hint (My morning routine would be ruined without this item)
cantaloupe
wheat
cotton
almond
soybean
Why have honey bees become the most useful pollinators to farmers?
They do not stray too far from their hives.
They are the most efficient pollinators.
They can be transported easily to farms.
Over 40,000 bees can live in one hive.
All of the answers are correct.
All of the following are true of honey bees, EXCEPT
they pollinate more than 100 different crops.
the crops they pollinate are worth $15 billion annually.
they help pollinate angiosperms.
the workers are all male.
they are a keystone species.
What percentage of the total energy in a food chain is passed from one organism to the next?
10%
20%
50%
90%
100%
What percentage of the total energy is lost due to metabolism, heat, and waste between trophic levels in a food chain?
10%
20%
50%
90%
1%
Which is NOT true of consumers?
They are higher up the food chain.
They are heterotrophs.
Some are photosynthetic.
Some are herbivores.
Some are carnivores.
What percentage of energy in a food chain comprising a blueberry bush, a mouse, and a hawk does the top consumer actually receive from the producer?
10%
1%
50%
100%
0%
A food web describes
the food chain in addition to predator-prey relationships.
the intersection of multiple food chains in a community.
parasitism in a food chain.
the addition of omnivores to a food chain.
symbiosis in a food chain.
Food chains are overly simplistic, as they do not consider
carnivores.
herbivores.
omnivores.
producers.
consumers.
An omnivore is
an herbivore.
a carnivore.
an animal eater.
a plant eater.
a plant and animal eater.
Mice eat fruits and nuts, and snakes eat mice. Which of the following is most likely to happen if snakes are removed from the community?
The number of fruits and nuts will increase, but mice populations will be unchanged.
The number of fruits and nuts will increase, and mice populations will also increase.
The number of fruits and nuts will be unchanged, and mice populations will also be unchanged.
The number of fruits and nuts will be unchanged, but mice populations will decrease.
The number of fruits and nuts will decrease, but mice populations will increase.
Which one of these examples are a mutualistic relationship?
the varroa mite on a bee
bees in a hollow of a tree
bees and flowering plants
tapeworm in humans
barnacles on a whale
Which of these describe a commensalistic relationship?
both organisms benefit
one organism benefits and the other is unaffected
one organism benefits and the other is harmed
All the choices are correct
Symbiosis describes
an interaction where one organism feeds on another.
feeding levels based on positions in a food chain.
interconnection of feeding relationships in a community.
species living in close association with each other.
a relationship where one member benefits and the other is unharmed.
A niche describes
the habitat occupied by a species.
the space, environment, and resources necessary for a species fitness.
the community’s place in an ecosystem.
the environment that an organism lives in.
the place where a population lives.
Competition for resources by two species occupying the same or similar niches is usually alleviated by
mutualism.
commensalism.
extinction of one species.
resource partitioning.
symbiosis.
What strategy does the African honey bee use when competing for resources?
migration
generalist foraging behavior
defensive behavior
resource partitioning
sharing of resources
Introduction of non-native species of bees to the United States may cause
competition for limited resources.
a decline in native species.
migration of native bees.
partitioning of food resources.
All of the answers are correct.
Why would amateur beekeepers think their hive has CCD?
The honeycombs are destroyed.
The larvae are dead or dying.
There are sick and dying bees in and around the hive.
Thirty percent to 90% of the bees have disappeared.
The bees no longer forage.
Which are these not a cause of CCD?
a virus
pesticides.
a parasite
stress and nutrition
competition
Prior to 1990, the United States produced ______ of the world’s maple syrup; today, Canada produces ______.
80%; 80%
20%; 80%
20%; 20%
90%; 80%
60%; 40%
Maple production in New England is being affected significantly by
drought.
temperature increase.
rain.
pestilence.
woolly adelgid.
For maple syrup producers, global temperature increase correlates with
a longer season.
an earlier season.
an earlier and shorter season.
a shorter season.
a longer and more productive season.
Which of the following BEST describes an ecosystem?
the animal life in an area
the plant life in an area
the plant and animal life in an area
the plant, animal, and bacterial life in an area
the plant, animal, and bacterial life plus the physical and chemical environment in an area
What would be evidence for increased temperature affecting plant species in a mountainous region?
the presence of non-native plant species
thriving plant species
migration of plant species to a higher elevation
migration of plant species to a lower elevation
extinction of plant species
Why would a plant species go extinct but an animal survive when temperature change alters a habitat?
Plants are less tolerant of rapid temperature change.
Animals are more tolerant of heat changes.
Animals are more mobile than plants.
Animals are more adaptable.
All of the answers are correct.
The maple tree would most likely be found in which biome?
tundra
temperate deciduous forest
boreal forest
coniferous forest
rainforest
The vegetation in a biome is largely influenced by
precipitation.
temperature.
temperature and precipitation.
geographical location.
migration patterns.
The greenhouse gases include
carbon monoxide, nitrogen, and ozone.
carbon dioxide, ozone, and methane.
carbon monoxide, methane, and nitrogen.
carbon dioxide, methane, and nitrous oxide.
methane, sulfur, and carbon dioxide.
Increases in greenhouse gases
increase the heat exiting the atmosphere.
releases heat into the atmosphere.
prevent the Sun’s energy from reaching Earth.
reflect heat from the Sun into the upper atmosphere.
trap heat in Earth’s atmosphere.
Which statement is FALSE?
Earth would be −18°C without the greenhouse effect.
The ozone hole is getting bigger from greenhouse gas emissions.
Global temperature is rising because of the greenhouse effect.
Carbon dioxide is a major greenhouse gas.
The greenhouse effect is normal.
Carbon dioxide has rapidly increased in
the last 50 years.
the last 1000 years.
the last 20 years.
the last 100 years.
the last 500 years.
Scientists have used all of the following to document global warming, EXCEPT
thermometers.
tree rings.
historical records.
seed-coat thickness.
ice cores.
If climate change eliminates a predator that is a keystone species, how will the ecosystem change?
The ecosystem will be slightly damaged.
Prey will eventually become extinct.
The ecosystem will eventually recover.
The ecosystem will be irreversible damaged.
The predator will be replaced and the ecosystem balance restored.
As a consequence of global warming,
only plants will be negatively affected.
only animals will be negatively affected.
all plants and animals will be negatively affected.
some plants and animals will be negatively affected, whereas others won’t be affected at all.
some plants and animals will be negatively affected, whereas others will be positively affected.
By the year 2050, as many as __________ species could be driven to extinction by global warming.
1000
10,000
100,000
1,000,000
10,000,000
Which land mass is showing the most dramatic increase in surface temperatures in recent years?
North America
Arctic
Europe
Africa
South America
Which of the following statements about global temperature change is TRUE?
Over the last 30 years, Arctic sea ice has shrunk by more than 1 million acres.
The equator is warming faster than the poles.
The equator is predicted to increase 4°C to 7°C over the next 100 years.
Eurasia warmed less than most other areas of the globe.
Although temperatures may warm, sea levels will remain stable.
Which will NOT cause an increase in sea water levels?
melting icebergs
melting sea ice
melting glaciers
melting polar ice caps
ice shelves breaking up
Which processes regulate the natural carbon cycle on our planet?
decomposition, transpiration, and respiration
transpiration and decomposition
photosynthesis and transpiration
photosynthesis, respiration, and decomposition
photosynthesis, nitrification, and decomposition
Which period brought a change to the natural carbon cycle of our planet?
the ice age
the industrial revolution
the medieval warm period
the Holocene
the interglacial warm period
Why are ice cores useful in tracking carbon dioxide levels?
Ratios of isotopes can be compared.
They contain sediment from volcanoes.
Air bubbles in the ice contain gases that can be measured.
Water can be analyzed for carbon dioxide.
They are easy to obtain.
What was the unintended consequence for predatory birds when trees infected with Dutch Elm disease were sprayed with DDT? Please select TWO correct answers.
Birds reproduced at a faster rate, as treated trees produced more fruit and provided food for more birds.
Leaves coated in DDT fell to the ground and were eaten by earthworms.
Earthworms absorbed DDT from the water supply, which poisoned the birds that ate them.
Birds died when they ate earthworms with accumulated levels of DDT.
Robins and other birds absorbed DDT as they nested in trees, which caused their eggs to have thin, weak shells
In aquatic environments, DDT is converted to DDE, a chemical that affects reproduction in predatory birds such as pelicans and bald eagles. In the 1950s, populations of these predatory birds plummeted. How did DDE from aquatic environments end up affecting eagles?
Eagles and other predatory birds often swim in coastal waterways.
DDE is volatile and contaminates moist coastal air in environments where predatory birds hunt and nest.
DDE is first absorbed from the water by zooplankton, and then moves up the food chain to higher trophic levels, eventually accumulating in predatory birds that feed on fish.
The roots of plants pull DDE up into the plants, which then produce contaminated seeds that are eaten by birds.
