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WorksheetsEcology Review
Total questions: 50
Worksheet time: 31mins
Los Angeles, California’s population is growing at an exponential rate. Which of the following would not be affected?
The amount of waste produced.
The quality of air.
The amount of water needed.
The amount of solar energy.
Carbon dioxide in the atmosphere enters the biotic part of the biosphere (earth) through _____________.
burning of the forest
photosynthesis
combustion of fossil fuels
precipitation
A population of foxes relies on rabbits for food. Which of the following could be a realistic explanation of ecological events?
If the number of rabbits increases, the number of foxes will increase in the near future.
If the foxes become ill, the rabbits will also become ill.
If the fox population decreases, then the rabbit population will also decrease.
If the rabbit population decreases, then the fox population will increase in the near future.
A hurricane sweeps across a small Caribbean island killing 50% of the herbivore species/primary consumers (those organisms that feed on producers/autotrophs) on the island. Which of the following is the most immediate result?
a reduction in biodiversity
an acceleration of the carbon cycle
an increase in predator populations
a decline in decomposer population
Which of the choices correctly represents how this energy is transferred from one group of organisms to another in an energy pyramid?
A = decomposers, B = primary consumer, C= producers, and D = predators
A = producers, B = primary consumer, C = plants, and D = carnivores
A = producers, B = primary consumer (herbivore), C = secondary consumer, and D = tertiary consumer
A = plants, B = carnivore, C = herbivore, and D = omnivore
Part of a desert food web is diagrammed below. Which of the following will most likely result if all of the primary consumers are removed from the ecosystem shown below?
Prarie rattlesnakes will become herbivores.
Golden eagle and kit fox populations will decrease.
Sagebrush grasshoppers will consume soil bacteria.
Silk grass and sand sagebrush populations will decrease.
A partial food web for a coastal ecosystem is shown below. In this ecosystem, is more energy available to the Sand shrimp from eating the Mysid shrimp or from the Sand shrimp eating the Algae? Explain your answer. (Hint: Remember the root beer energy pyramid demonstration.)
More energy is available to the sand shrimp eating the mysid shrimp.
More energy is available to the sand shrimp eating the algae.
In a forest that measures 5 miles by 5 miles, a random sample was taken to count the number of silver maple trees in the forest. The number of trees counted in the grid was 8, 4, 6, 10, and 12. The grids where the survey was taken were chosen randomly. Determine how many silver maple trees are in this forest using the random sampling technique. You may want to sketch a 5 by 5 square with these numbers randomly placed in the squares to understand this better.
8
40
200
400
A food web has been constructed to show the flow of energy from one organism to another:
Which is/are the producer(s) in this food web?
snakes
mice
fox
eagle
grass
A food web has been constructed to show the flow of energy from one organism to another:
Which is/are the primary consumer(s) in this food web?
eagles
cougars
snakes, owls, and foxes
rabbits, mice, and deer
grass
A food web has been constructed to show the flow of energy from one organism to another:
Which is/are the secondary consumer(s) in this food web?
owls, snakes, foxes, cougars, and eagles
rabbits, mice and deer
grass
none of these
A food web has been constructed to show the flow of energy from one organism to another:
Which is/are the tertiary consumer(s) in this food web?
grass
deer, rabbits, and mice
cougars, foxes, owls, snakes, and eagles
none of these
How much energy would be transferred to the primary consumer if the producers had 100,000 kcal of energy in them?
10,000 kcal
1000 kcal
100 kcal
10 kcal
How much energy would be transferred to the secondary consumer if the producers had 100,000 kcal of energy in them?
10,000 kcal
1000 kcal
100 kcal
10 kcal
How much energy would be transferred to the tertiary consumer if the producers had 100,000 kcal of energy in them?
10,000 kcal
1000 kcal
100 kcal
10 kcal
Determine which type of symbiotic relationship is shown for the following situation.
A tapeworm that lives inside the intestinal tract of a dog. The tapeworm receives nourishment from the dog while the dog is harmed.
parasitism
commensalism
mutualism
coevolution
Determine which type of symbiotic relationship is shown for the following situation.
Honeybees feeding on a flower’s nectar and spreading the flower pollen to another flower.
parasitism
commensalism
mutualism
coevolution
Determine which type of symbiotic relationship is shown for the following situation.
A barnacle attaches itself to a whale where it can be transported to different food sources. The whale is unaffected by this relationship.
parasitism
commensalism
mutualism
coevolution
A rocky island appears as oceanic waters recede. Which of the following organisms would probably appear first on the bare rocks?
lichens
weeds
shrubs
pioneer trees
A population that is growing exponentially in the absence of limiting factors can be illustrated by a(n) ________.
S-shaped curve
J-shaped curve
curve that terminates in a plateau phase
tolerance curve
Bacteria and fungi act as ________ within an ecosystem.
producers
primary consumers
secondary consumers
decomposers
Which of the following is an example of secondary succession?
appearance of mosses and weeds on an exposed rock fence
abandoned farm field covered with weeds and shrubs
former pond now supporting growth of shrubs and trees
establishment of plants on a newly-formed island
An organism's "trophic" level refers to ________.
the rate at which it uses energy
where it lives
what it eats
whether it is early or late in ecological succession
The niche of an animal is best defined as?
the number of individuals of the species the environment will support
the same as its habitat
the role an animal has in its environment
the specific place within the habitat where the animal lives
Which of the following are examples of limiting factors that affect population growth?
competition
predation
parasitism and disease
all of these
A population that is growing geometrically (logistically) in the presence of limiting factors can be illustrated by a(n) ________.
S-shaped curve
curve that terminates in a plateau phase
J-shaped curve
tolerance curve
How do invasive species harm an ecosystem?
1.they upset the natural balance by killing everything off
2.they upset the natural balance by competing with other organisms for food
3.they upset the natural balance of the ecosystem by not having a natural predator (something that eats it)
4.both 2 and 3 are true
An invasive species is defined as
a species that lives in a place naturally
a species that is not native to an area
a native species
none of these
Ecology is the study of
the structure and function of the body
the study of how organisms change/adapt over time
the study of organisms and how they interact with one another and the environment in which they live
the study of plants
Ocean acidification is caused by
the burning of fossil fuels which expels greater amount of CO2 into the oceans
dumping acid and other contaminants into the ocean
sea creatures that lost their outer shells
the waste given off by animals that live in the sea
A gradual process of change and replacement in a community is called
ecology
ecological succession
climax community
pioneer species
A relationship in which two different organisms live in close association with each other is called
parasitism
commensalism
mutualism
symbiosis
The hunter
predator
prey
The hunted
predator
prey
The type of pattern of distribution you want to use if you are trying to determine how many organisms are in a large area using random sampling techniques.
clumped
even
random
none of these
The number of individuals of the same species that live in a given unit of area is called the
population density
species density
community density
ecosystem density
The largest population (K) that an environment can support at any given time before population growth no longer increases.
vital capacity
carrying capacity
lung capacity
none of these
The movement of an individual or group into an area
emigration
immigration
The movement of an individual or group out of an area
emigration
immigration
The number of deaths occurring in a period of time.
mortality
natality
The number of births that occur in a period of time in a given area.
mortality
natality
An organism that eats a variety of other organisms (plants and animals).
carnivore
herbivore
omnivore
producer
An organism that eats animals.
carnivore
herbivore
omnivore
producer
An organism that eats only plants.
carnivore
herbivore
omnivore
producer
An environmental factor that is associated with or results from the activities of living organisms.
abiotic factore
biotic factor
An environmental factor that is not associated with the activities of living organisms.
abiotic factor
biotic factor
The place where an organism usually lives.
ecosytem
community
habitat
population
A group of organisms of the same species that live in a specific geographical area and interbreed.
community
ecosystem
habitat
population
A group of various species that live in the same habitat and interact with each other.
community
ecosystem
habitat
population
A community of organisms and their abiotic environment in which they interact.
community
ecosystem
habitat
population
