WorksheetsSB5 A-E Review
Total questions: 62
Worksheet time: 1hrs 2mins
The picture below shows a mimosa leaf before and after it was pinched.
It is moving away from the pull of gravity.
It is moving away from touch.
It is moving toward touch.
It is moving toward light.
Food Availability, Places to live, and water availability are all ______ of an Ecosystem.
Biotic factors
Heterotrophic factors
limiting Factors
Population factors
The image shown is of a kelp bed. In ideal conditions, kelp can grow up to 18 inches per
day. In stark contrast to the slow-growing corals, the giant kelp canopies tower above the
ocean floor. Like trees in a forest, these 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. If the kelp is reduced or destroyed the basis for the entire
ecosystem is destroyed as is the ecosystem.
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.
The population of mice in a local forest ecosystem has recently died out due to disease. In
the past, these mice were the main predators of the forest beetles.
What is the best prediction about what will happen to the beetles?
The drop in the mouse population will lead to a drop in the beetle population.
The drop in the mouse population will lead to no change in the beetle population.
The drop in the mouse population will lead to an increase in the beetle population.
The increase in the mouse population will lead to an increase in the beetle population.
When the members of a population reproduce at a constant rate and overshoot the
carrying capacity of their environment, it is called _______________ growth.
logistic
demographic
exponential
density dependent
In an ecosystem, which is NOT a density-dependent limiting factor?
predation
parasitism
competition
natural disaster
Choose the letter than correctly answers the question.
Which of the these is shown from the smallest to the largest?
organism, population, community, ecosystem, biosphere
biosphere, ecosystem, community, population, organism
population, ecosystem, community, organism, biosphere
community, ecosystem, biosphere, population, organism
Which of the following statements describes density-independent limiting factors?
Competition is an example.
Environmental extremes, such as a hurricane or drought, are examples.
Their effects increase as the population increases in an area.
The drawings below show a young sunflower plant at different times of the day.
Which of the following describes the plant's movement?
It bends away from the pull of gravity.
It bends away from light.
It bends toward light.
It bends toward water.
Which of the following statements on ecosystem stability is correct?
Higher biodiversity in an ecosystem provides better stability.
Multiple keystone species are important to ecological stability.
Ocean ecosystems are far more stable than terrestrial ecosystems.
Higher animal to plant ratios provides the most stable environment.
What is a group of individual organisms that belong to the same species?
Community
Ecosystem
Biome
Population
Some birds are known as honeyguides because humans often follow them to wild beehives. When the humans take the honey from the hives, the birds are able to feast on
the honey and the bees as well. This type of relationship between the humans and the birds can best be described as
Mutualism
Commensalism
Parasitism
Herbivory
If two species of organisms occupy the same niche ____________
one will find a new habitat.
competition will be very intense.
both organisms will become extinct.
both will need to enlarge their habitat.
What impact do the amounts of available energy, water, and oxygen have on an
ecosystem?
They are used as nutrients by living organisms.
They recycle the residue of dead organisms.
They control the environment's energy source.
They act as limiting factors on the organisms.
What do tropisms NOT allow a plant to do?
respond to light
respond to gravity
respond to water sources
respond to sound
Look at the image
gravitropism
phototropism
thigmotropism
rapid response
Alligators will use their powerful feet, tail, and snouts to dig a hole through the mud, producing small ponds known as "alligator holes." Many other species benefit from
alligator holes. During the dry season, fish, turtles, and other aquatic animals live in the alligator holes. Birds, terrestrial animals, and plants use these holes as a source of water. What term best describes the role of alligators in this ecosystem?
invasive exotic species
keystone species
producer
primary consumer
Which is NOT an abiotic limiting factor?
too much water
too high temperature
insufficient nutrients
population overcrowding
Which of the following is an example of a density-dependent limiting factor?
temperature
predation
oxygen supply
an earthquake
A graph representing a population growth curve is shown
What does B represent on this growth curve?
a population's carrying capacity
exponential growth within a population
linear growth within a population
the lag phase of a population's growth
The graph shows the population growth of a colony of insects over time.
Which statement below best explains what might have occurred to the population of insects at point A?
The health of the insects improved, causing the population to stabilize.
A predator was introduced, causing a decline in population growth.
The population growth decreased as individual insects aged.
The population reached a carrying capacity and stabilized.
Where does the light that most plants use for photosynthesis come from?
water reflections
the Sun
Earth
electric lights
Which of the following molecules is present in all living organisms?
carbon
sulfur
silicon
calcium
Which organisms are always on the first level in a food chain?
herbivores
consumers
autotrophs
heterotrophs
Read the passage "A Food Chain on TV" in the box
If Khloe were to draw a food chain for the environment on the nature program, to which
living thing should the last arrow point?
cheetah
grass
zebra
shrubs
A food web is shown. Which organisms feed on both producers and decomposers?
Protozoa
Amphipods
Crayfish
Catfish
What is the primary role that plants play in the carbon cycle?
They absorb carbon dioxide and release oxygen.
They create food and absorb nutrients.
They absorb soil and release water.
They create carbon dioxide and release water.
The diagram shows a general representation of an energy pyramid for a living system. As energy flows through the pyramid,
10% of available energy is passed to each increasing trophic level.
25% of energy is gained at each increasing trophic level.
energy remains the same at each trophic level.
energy increases at each trophic level.
The diagram shows a simple food chain. Which organism in the food chain receives energy as a secondary consumer?
wheat
snake
mouse
kestrel
Directions:
The diagram shows the carbon cycle. Use the diagram to answer any questions that follow. How does carbon dioxide enter the atmosphere?
Carbon dioxide is only released into the atmosphere by human activities.
Carbon dioxide is only released into the atmosphere by animals and bacterial decomposers.
Carbon dioxide is only released into the atmosphere by plants, animals, and bacterial decomposers.
Carbon dioxide is released into the atmosphere by plants, animals, bacterial decomposers, and human activities.
How would the carbon cycle be disrupted if many plants on Earth died off?
The amount of water in Earth's atmosphere would decrease, trapping water vapor and causing Earth's atmosphere to become warmer.
The amount of carbon dioxide in Earth's atmosphere would increase, trapping water vapor and causing Earth's atmosphere to become warmer.
The amount of oxygen in Earth's atmosphere would increase, releasing water vapor and causing Earth's atmosphere to become cooler.
The amount of nitrogen in Earth's atmosphere would increase, releasing water vapor and causing Earth's temperature to become cooler.
What must be present in an environment for a producer to maintain its function in an energy pyramid?
carnivores
parasites
sunlight
herbivores
A food pyramid is shown below. Which of the following describes the energy transfer between the levels in the food pyramid?
Energy travels up the food pyramid.
Energy stays in the lowest level in the food pyramid.
Energy stays in the highest level in the food pyramid.
Energy travels down the food pyramid.
How do nutrients, such as carbon and water, move through an ecosystem?
in biogeochemical cycles
in ecological pyramids
in energy pyramids
in food webs
Decomposers, such as bacteria, fungi, and insects break down organic matter.
Decomposition is an important process for which of the following cycles?
water cycle
cell cycle
rock cycle
carbon cycle
Which of the following statements is true of photosynthesis?
Chlorophyll in animal cells helps convert light energy to food energy.
Oxygen is taken in and carbon dioxide is released.
Sunlight provides the energy for the process.
Glucose is taken in and water is produced.
When conditions are stable, which energy pyramid correctly represents the amount of available energy to the organisms in the ecosystem?
What factors affect biodiversity and populations in ecosystems?
Pollution levels
Availability of resources
Climate and weather patterns
All of the above
Which process is not part of the cycling of carbon in ecosystems?
Weathering and Erosion
Respiration
Photosynthesis
Decomposition
What is the role of decomposers in a food web?
They consume living plants
They control the population of other species
They produce their own food
They break down dead organisms
Which of the following is not a major biochemical element cycled in ecosystems?
Carbon
Iron
Nitrogen
Phosphorus
How does energy flow through an ecosystem?
From producers to decomposers
From primary consumers to producers
From decomposers to consumers
From producers to consumers to decomposers
What amount of the sun's energy is passed from producers to primary consumers?
90%
Which human activity has the least impact on the environment?
Deforestation
Urbanization
Industrial pollution
Recycling
What is a solution to reduce the impact of human activity on the environment?
Using more pesticides in agriculture
Increasing fossil fuel consumption
Reducing waste through recycling
Expanding urban areas
Which of the following would be an adaptation a plant would use to survive?
Responding to sunlight
What does not contribute to the stability of an ecosystem?
High biodiversity
Deforestation
Cycling of nutrients
Energy flow through trophic levels
What is not a factor in an organism's ability to survive environmental changes?
Behavioral adaptations
Population size
Color of the organism
Genetic diversity
Which is not a component of a food web?
Artificial structures
Primary consumers
Decomposers
Producers
If you were to place the bear into the energy pyramid, the bear would go on level ______ and have ________ amount of energy available to it.
C; the least
A; the least
B; the most
C; the most
A laboratory investigation examined the growth rate of fruit flies in culture jars over time. The fruit flies were grown in an artificial medium containing nutrients and moisture. Initially, there were ten fruit flies in the experiment. The population reached 75 over the course of four weeks. However, after eight weeks, the population size leveled off and then decreased. Survival of fruit fly larvae declined after eight weeks. Which hypotheses are supported by the information in this scenario? Select the THREE that apply.
The older fruit flies were unable to reproduce.
The carrying capacity was exceeded by the fly population.
Food was abundant for the first four weeks of the experiment.
The fruit flies were unable to survive in a laboratory setting.
The carrying capacity decreased when no new food was added to the culture jars.
Clean air is of concern to most Americans. The Environmental Protection Agency (EPA) has set forth guidelines for business, industry, and private citizens to follow to help improve air quality. All but one is a guideline of the EPA to improve air quality. That is
check and replace air filters regularly
reduce, reuse, and recycle whenever possible
reduce the amount of particulate matter by limiting burning
fix leaking faucets and minimize outdoor water use
A farmer abandons one of his fields, and over the years he noticed that one community is replaced by another community. This replacement represents part of
A food chain
An abiotic community
A pyramid of energy
An ecological succession
The sequence A through E represent stages of ecological succession in a given area. Which diagram shows the greatest number of pioneer organisms?
A
E
C
D
Years after lava from an erupting volcano destroyed an area, lichens started to grow in that area. These were replaced by grasses, shrubs, conifers and finally a deciduous forest. If the deciduous forest remains unchanged, it will be referred to as
A pioneer community
A climax community
A food chain
The biosphere
Which type of ecological succession begins with the presence of soil
Primary Succession
Ecosystem Succession
Secondary Succession
None of the above
Which type of ecological succession begins without the presence of soil
Primary succession
Ecosystem succession
Secondary succession
None of the above
Biotic factors in the environment that have an increasing effect as population size
Limiting factors
Density-dependent factors
Density-independent factors
Carrying capacity
Abiotic factors in the environment that affect populations regardless of their density
Density-dependent factors
Limiting factors
Density-independent factors
Carrying capacity
All of the following are examples of limiting factors EXCEPT
Food
Time
Temperature
Water
The maximum population size that can be supported by available resources
Limiting factors
Dispersion
Carrying capacity
Immigration
African elephants play a critical role in balancing their ecosystem. Therefore, they are known as
Abiotic factors
Keystone species
Predators
Prey
