WorksheetsUnit 1 Ecology Test 22-23 REVIEW
Total questions: 29
Worksheet time: 17mins
What does the yellow line represent?
exponential growth
logistic growth
carrying capacity
none of the above
In a rainforest ecosystem, a variety of predators
compete with one another for the same prey. The
predators include coral snakes, jaguars, anaconda and
hawks. Their prey include birds, rabbits, mice, and
armadillos. Suppose that human activities,
such as hunting, drastically reduce the
populations of the jaguars, anacondas and coral snakes.
Which statement best explains a likely change to
the hawk population?
The hawk population increases to a new
carrying capacity that is determined by one or
more limiting factors, such as the availability of
food.
The hawk population remains constant because
competition has no effect on carrying capacity.
The hawk population decreases because of the
natural cycle that affects predators and prey.
The hawk population increases in a pattern of
exponential growth, because there are now
unlimited resources.
The amount of water available limit the growth of a population?
True
False
Unsure
A disease that affects a moose population spread
out in a large forest would have less impact than
the same disease on a moose population in a
much smaller forest because
Diseases are density-dependent factors
Diseases are density-independent factors
Diseases are not a limiting factor
Diseases are an abiotic limiting factor
Giant algae
provide food and shelter for thousands of fish,
invertebrates, and marine mammal species.
Storms and weather events, like El Niño, can tear
and dislodge the kelp, leaving a tattered forest to
begin its growth again each spring. Sea otters
and sea urchins play critical roles in the stable
equilibrium of this ecosystem. Sea urchins graze
kelp and may reach population densities large
enough to destroy kelp forests at the rate of 30
feet per month. Urchins move in herds, and
enough urchins may remain in the location of a
former kelp forest to stop any regrowth.
In the scenario above, identify the keystone and
foundation species. Infer what might happen if
the keystone species were greatly reduced.
Keystone species is the kelp. It is the foundation
for this ecosystem. If destroyed it would be
replaced by another producer to establish a
different ecosystem.
Keystone species is the sea otter. Sea otters,
playing a critical role in containing the urchin
populations, prey on urchins and thus control the
numbers of kelp grazers to maintain the forest.
Keystone species is the sea urchin. If the sea
urchin species is greatly reduced by an increase
in the sea otter population, the kelp beds would
continue to grow unchecked and other
populations of herbivores would grow.
Keystone species is the kelp. If the kelp is
reduced or destroyed the basis for the entire
ecosystem is destroyed as is the ecosystem.
Which of the following correctly shows an energy pyramid?
A
B
C
D
Insecticides kill.....
cats
insects
monkeys
tigers
How much energy is transferred from one trophic level to the next in an energy pyramid?
1%
10%
100%
90%
Which of the following is deforestation (cuting down plants/trees) most likely to cause?
an increase in the amount of carbon dioxide in Earth's atmosphere, trap water vapor and become warmer
an increase in the amount of ozonee in Earth's atmosphere
an increase in the amount of soil on Earth's surface
what is deforestation?
Process by which nitrogen is returned back to the atmosphere
Denitrification
Nitrogen fixation
Cellular Respiration
Photosynthesis
What would happen if humans stopped the process of denitrification?
atmospheric nitrogen = remain constant, nitrogen-fixing bacteria = die
atmospheric nitrogen = increase, nitrogen-fixing bacteria = die
atmospheric nitrogen = decrease, nitrogen-fixing bacteria = die
atmospheric nitrogen = decrease, nitrogen-fixing bacteria = remain constant
Species that are clearly critical to the functioning of an ecosystem...the ecosystem would become unstable and populations would not be regulated in the same way..... are known as
biodiversity
keystone species
main species
native species
How is the greenhouse effect produced?
When solar energy trespasses the atmosphere.
When some energy is reflected back to earth.
When the green house is burned.
When the sun doesn't emit radiation.
Which of the following could be a possible
adaptation that could develop in animals whose
climate changes slowly from tropical
temperatures to temperate temperature, including
times in which the temperatures are around
freezing?
larger eyes
larger ears
camo
fur thickness
result of a wildfire
climax community
pioneer species
secondary succession
primary succession
After a volcano covers the side of a mountain in
lava and ash, primary succession must occur.
Which species would best survive among the
first years of the pioneer species plants?
large animals that use the pioneer plants as a
habitat
carnivores that hunt animals that survive on
pioneer plants
small insects that live inside the pioneer plants
and have fewer prey
Humans exhale carbon dioxide, plants use carbon dioxide in photosynthesis, plants produce oxygen for humans. This is an example of which type of symbiotic relationship?
commensalism
competition
mutualism
parasitism
Fleas, ticks and tapeworms are can be found on dogs. This is an example of which symbiotic relationship?
competition
parasitism
commensalism
mutalism
Kilocalories (kCal) is a measure of energy. If there are 1000 kCal available for the producers in trophic level #1, how much energy is available for the secondary consumers trophic level #3? (Hint: use the Rule of 10s)
10 kCal
1 kCal
100 kCal
1000 kCal
Which of these is shown in order from the smallest to the largest?
community, ecosystem, organism, population, biosphere
biosphere, organism, population, ecosystem, community
organism, population, community, ecosystem, bioshpere
Iguanas, which eat only plants, are not native to
Florida, but they were introduced years ago.
Which animal population is most likely to be
threatened if Florida's iguana population
increases?
herbivore
carnivore
fish
bird
Increased diversity among species increases the chance that some species will
survive a change in the environment.
true
false
