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WorksheetsCh 6 Communities and Ecosystem Dynamics
Total questions: 81
Worksheet time: 3hrs 44mins
The level of biodiversity that involves a variety of habits and communities is _____ diversity.
ecosystem
population
genetic
species
What level of biodiversity is most commonly equated with the overall concept of biodiversity?
genetic
ecosystem
species
population
Why is biodiversity important to ecosystems?
It helps populations adapt to ecological changes.
It increases at each level of the food chain.
It provides more abiotic factors for the ecosystem.
How many species are known to be living on Earth?
between 10,000 and 100,000
between 1 and 2 million
between 5 and 9 million
between 10 and 50 million
Biodiversity, aka biological diversity, usually refers to
the same species in a general location
the number of different species in a given area
the number of animal species in a given area
the number of plant species in a given area
Define genetic diversity
variation of genes within a species or population in a given area
variety of ecosystems in a given area
system made up of all the living and nonliving things in a given area
disturbance in the environment conditions that cause genetic changes to occur in organisms
Which statement best describes an example of low species diversity?
A population of frogs has a wide variety of skin colors
A marsh ecosystem is covered by a single species of cattail bulrushes
A state park includes multiple forest, wetland, and freshwater ecosystems
Which statement best describes an example of high species diversity?
A pond ecosystem is populated by a single species of frogs
A state park includes multiple forest and freshwater ecosystems with many different species of fish, frogs, and birds
A desert ecosystem is populated only by organ pipe cacti, camels, and armadillo lizards
Which of the following in not an example of a keystone species?
Beavers
Round Gobies
Sharks
Sea Otters
Which level of biodiversity helps to prevent the negative effects of bottlenecks?
Ecosystem diversity
Genetic diversity
Species diversity
Ecotourism is a form of tourism that supports the conservation and sustainable development of ecologically unique areas.
True
False
A mixture of two different types of crops is known as...
keystone species
ecotourism
hybrids
endemic species
Which of the following is not one of the advantages of biodiversity to humans?
Medical uses
Recreation
Industrial uses
Bottlenecks
In the woods, there are hawks and robins. They both try to occupy the same niche by competing for worms as the only source of food in that same area at that same time. The hawks outcompete the robins, and the robins are forced to leave that area. This is an example of:
Mutualism
The competitive exclusion principle
Commensalism
Neutralism
Barnacles are animals that cannot move. In order to get food, they attach to whales and catch any floating plankton in the water. The whale is neither helped nor harmed in the interaction. What type of symbiosis is this?
Mutualism
Commensalism
Parasitism
Amensalism
In the sea, little fish called pilot fish swim closely to sharks. The pilot fish clean the sharks, and the sharks provide protection for the pilot fish. What type of symbiosis is this?
Mutualism
Commensalism
Parasitism
Amensalism
In an ecosystem, there are populations of deer, rabbits, grass, and pine trees. Suddenly, a fire blazes through the area, which kills all of the populations. As the months go on, new species of grass begin to take root. This attracts animals, and eventually the ecosystem is restored.
What type of ecological succession happened?
Primary succession because it started with rocks.
Primary succession because there was soil to begin with, and plants existed before the disaster.
Secondary succession because it started with rocks.
Secondary succession because there was soil to begin with, and plants existed before the disaster.
In Hawaii, there are volcanoes. Before anything was there, the volcanoes erupted which produced volcanic rock. Lichens were the first species to arrive, and they broke down the rock into soil. Eventually, plants began to grow. Now, the islands are functioning at their climax community.
Is this an example of primary or secondary succession?
Primary succession
Secondary succession
In Hawaii, there are volcanoes. Before anything was there, the volcanoes erupted which produced volcanic rock. Lichens were the first species to arrive, and they broke down the rock into soil. Eventually, plants began to grow. Now, the islands are functioning at their climax community.
What is the pioneer species in this example?
Shrubs
Lichens
Trees
Rock
What is this picture describing?
It is describing direct competition between flamingos and ducks.
It is describing natural selection as it follows the disruptive selection pattern.
It is describing the niche of each bird within the tree.
It is describing abiotic factors of the tundra.
What term describes the range of conditions that an organism can endure and survive in?
Habitat
Niche
Microclimate
Tolerance
In this photo, two lions are fighting for a resource. What type of competition is this?
Interspecific competition
Intraspecific competition
Machismo
Competitive exclusion principle
What is this picture describing?
It is describing how two organisms cannot occupy the same niche in the same place at the same time through the competitive exclusion principle.
It is illustrating the intercompetitive inclusion principle.
It is describing the amount of time it takes for bacteria to reach exponential growth.
It is illustrating the mutualistic relationship between two organisms when they live in the same niche.
This photo is showing the differences in annual rainfall. What best describes why there are differences on this island?
The rainfall is different because people can control the weather on Maui.
There are microclimates on Maui which produce differences in the average amount of rainfall.
The microhabitats provide different shelters for different organisms.
The differences in organism symbioses produces a range of rainfall.
This photo is showing the same ecosystem in 2 scenarios: one with the sea otter and one without the sea otter. In the ecosystem without the sea otter, the ecosystem dynamics are completely changed. What term best describes the sea otter?
Niche
Climax community
Pioneer species
Keystone species
T/F: Biodiversity is a good thing because it provides variety in an ecosystem.
True
False
What term describes the ability of an organism or ecosystem to adapt after a disturbance?
Tolerance
Resilience
Biodiversity
Niche
Many different organisms are competing for the zebra as food. What type of competition is this?
Intraspecific competition
Interspecific competition
The actual place an organism lives is its
house
habitat
ecosystem
environment
True or False: There are physical and biological environmental factors that affect which organisms can live in a habitat
True
False
Habitats where really small organisms live is called a
microenvironment
microhabitat
microbiome
a and b
A microhabitat has its own set of environmental conditions called its
climate
macroclimate
microclimate
small biome
Microbes in the soil have an important job. What is it
Decomposers
giving nutrients to plants
Absorption
A and b
The variety of environmental conditions which an organism survives and reproduces is called
adaptation
microbiome
tolerance
optimum range
These conditions enable organisms to find enough energy and nutrients to maintain homeostasis, to grow and reproduce
adaptation
microclimate
Tolerance
Optimum Range
If conditions fall above or below the optimum range an organisms will experience
Death
stress
adaptation
tolerance
Where an organism lives and what it does for a living, including how they interact with biotic and abiotic factors is a species
habitat
ecosystem
niche
community
Any necessity essential for live is called
food
water
a resource
shelter
When more than one organism attempts to use the same resource you have
competition
adaptation
niche
death
What states that no two species can occupy exactly the same niche in exactly the same habitat at the same time
competitive inclusion principle
competitive exclusion principle
competitive adaptation
competitive nice principle
What contains numerous producers and many consumers on several trophic levels
food chain
food pyramid
food niche
food web
True or False: Predator Prey relationships do not affect populations
True
False
True or False: Herbivores impact the plant population
True
False
A species that plays a vital role in maintaining structure, stability, and diversity in an ecosystem.
Nice Species
Major Species
Impact species
Keystone Species
True or False: A keystone species has a powerful influence on an ecosystem
True
False
A close interdependent relationship between two species is called
symbiosis
nice
clinger
Mutual Relationship
When one species benefits and the other is not harmed
mutualism
commensalism
parasitism
adaptations
A relationship where both species benefit
mutualism
commensalism
parasitism
adaptation
A relationship where one species benefits and the other is harmed
mutualism
commensalism
parasitism
adaptation
A series of somewhat predictable events that occur in a community over time
Ecological Parasitism
Ecological Community
Ecological Succession
Ecological imprint
Succession that begins on newly formed rock or other areas that have no remnants of an older community is called
Secondary Succession
Primary Succession
Primo Succession
No Succession
The first species to colonize barren areas
first species
pioneer species
pioneer adapter
new life
When a disturbance affects an existing community but doesn't completely destroy it what occurs?
primary succession
secondary succession
secondary adaptation
primary adaptation
True or False: Succession occurs in most cases by each species altering its environment in ways to make it easier for other species to compete for resources and survive.
True
False
A community that is specific, uniform and stable is called a
adapt community
climax community
new commuinty
balanced community
True or False: Humans have no impact on the environment and do not impact succession.
True
False
The total of all genetically based variation in all organisms in the biosphere is called
differentation
superdiversity
biodiversity
diversity
The variety and variability of habitats, communities, and ecological process in the biosphere is
Ecosystem Adaptation
Ecosystem diversity
Ecosystem differential
Ecosystem standard
The number of different species in the biosphere, or in a particular area
Ecosystem Diversity
Genetic Diversity
Species Diversity
Biosphere diversity
The total of all different forms of genes present in a particular species.
Genetic Diversity
Species Diversity
Ecosystem Diversity
Biosphere diversity
True Or False: Biodiversity has man benefits
True
False
A natural or human system's ability to recover after a disturbance is
adaptation
ecosystem diversity
commensalism
resilience
True or False: Resilient ecosystems have some ability to adapt to changes over time
True
False
The benefits provided by ecosystems to humans are called
Ecosystem adaptations
Ecosystem services
Ecosystem benefits
none of the above
Natural disturbances, such as fires or hurricanes, can result in
A.parasitism.
B.competition.
C.commensalism.
D.succession.
The end result of ecological succession is usually a(n)
A.land biome.
B.aquatic biome.
C.unstable community.
D.climax community.
Which of the following is not a possible cause of ecological succession?
A. fire
B. flood
C. earthquake
D. change of season
. Which of the following is an example of primary succession?
A.lichens growing on rocks following a volcanic eruption
B.grasses growing after a forest fire
C.oak trees replacing pine trees in a forest
D. non-native species introduced into a climax community
Which of these organisms would you most expect to find on a small island that formed as a result of a volcanic two years prior?
A.climbing vines
B.hardwood tree
C.monkey
D.lichen
Which of the following describes how an abiotic factor can impact the population dynamics in an ecosystem?
A. A parasite that invades a host can reproduce and cause a decline in the host species population.
B. Organisms that compete for the same resources will keep each other from overpopulating.
C. Predators will prevent herbivores from depleting the plants and other resources in an ecosystem.
D. Seasonal variations in temperature can cause some of the individuals in a population to die.
How is primary succession different from secondary succession?
Primary succession starts with soil.
Secondary succession start with bare rock.
Primary succession starts with bare rock, with lichens and moss.
Fire is an example of primary succession.
Examples of Abiotic Factors include:
Weather, birds, plants, and animals
Rocks, reptiles, shrubs, trees, and grasses
Weather, wind, rain, sunlight, and rocks
Birds, plants, animals, reptiles, shrubs, trees, and grasses
Several years after a building had been torn down and the ground cleared, grasses began to grow in that area. After 10 years, small bushes replaced the grasses. This pattern of plant growth is known as:
Biological
control
Cover cropping
Ecological
succession
Land-use
management
A volcano in a mountainous, wooded region erupts, spewing tons of ash and destroying the forested area around the volcano. If the volcano remains dormant during
the next 1000 years, what will probably happen?
The area will be repopulated by trees, eventually becoming a
forest again.
The mountains will erode and remain without life.
The area will remain unchanged, covered by volcanic ash.
The area will turn into a completely different habitat, such as
desert of plains.
How has the invasion of pythons effected the everglades ecosystem in terms of species numbers?
The pythons could upset the territorial boundaries of native organisms.
The pythons could adapt to overcome diseases common to native snakes.
The pythons could prey on native organisms and cause native populations to decline.
The pythons could begin to interbreed with native snakes and produce a more successful species.
Scientists found, that over a period of 200 years, a mountain pond was transformed into a meadow. During that time, several communities of organisms were replaced by different communities. Which of these best explains why new communities were able to replace older communities?
A.The original species became extinct.
A.Species in the older community died from old age.
A.The abiotic characteristics of the habitat changed.
A.Diseases that killed the older organisms disappeared.
Which is a natural cause of
ecosystem change?
A. Farming
B. Building fences
C. Pollution
D. Hurricane
Which of the following best
describes biodiversity
A. a diverse Biology class
B. variety of all life on earth
C. a variety of plants
D. a variety of animals
Abandoned railroad tracks are overgrown with weeds. Ten years later there are small aspen trees growing in the middle of the tracks. This change is an example of:
Primary succession
Biological evolution
Secondary succession
Heterotrophic nutrition
Which of the following is not a result of climate change partially caused by burning fossil fuels?
Leaves changing color in the fall months.
Caribou not being able to receive food for their young because of an earlier spring season.
Ice melting in the polar regions, causing polar bears to drown.
Acid rain falling on homes and buildings.
