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WorksheetsEcology Test Review
Total questions: 15
Worksheet time: 15mins
A forest ecosystem food web is shown below. If additional wrens (small birds) are introduced into this ecosystem, there will most likely be an immediate decrease in the
frog population
snake population
falcon population
grasshopper population
In a pond, the primary producer is a green algae; the primary consumer is a crustacean; the secondary consumer is a small fish, the bluegill; and the third consumer is a larger fish, the smallmouth bass. What changes can be expected in the pond if the crustaceans are killed with pesticide?
The green algae population will probably die
The bluegill population will probably increase
The crustacean population will eat something else
The smallmouth bass population will die
Ecosystems are composed of all living and nonliving components in an area. Food webs show the flow of nutrients and energy within an ecosystem. Use the food web to answer the following question. Suppose that a new predator of the rabbit migrated (entered in) to this ecosystem. What is the most likely initial effect on the other organisms?
More competition among the mice for food
more competition among the hawks for food
less competition among snakes for food
less grass available for food.
How would the removal of earthworms from the food chain affect the other organisms?
The number of bass (fish) will increase
the number of crayfish will decrease
the crayfish will get their energy directly from the sun
The number of bass (fish) and ospreys (bird) will increase
In ecosystems, the sun's energy is transferred through food webs as show below. The sun's energy is most directly available to people through
Path A
Path B
Path C
Path D
The picture below shows an energy pyramid. What will most likely happen to the foxes and the wolves if the rabbits are removed?
The foxes will eat more wolves.
The foxes will eat fewer wolves.
There will be more foxes and wolves.
There will be fewer foxes and wolves.
The picture below shows an ocean bay food chain.Sea otters move into the ocean bay. They eat all the sea urchins. This change will cause the
kelp to have less food.
crabs to have more food
sea ducks to have less food
arctic faxes to have more food
A marine food web is shown below. Which chart correctly shows three of the organisms according to their roles in cycling matter in the marine food web?
The picture below shows the energy flow through a meadow community. Which of the following would most likely occur to the populations within the community of organisms immediately after a wildfire burns the environment?
Hawks would increase and foxes would increase
Hawks would decrease and foxes would increase
Meadow plants would increase and rabbits would decrease
Meadow plants would decrease and rabbits would decrease
Which statement best describes the flow of energy as it passes through the organisms in the pyramid?
Energy flows through the organisms from bottom to top and increases at each level
Energy flows through the organisms from the bottom to top and decreases at each level.
Energy flows through the organisms from top to bottom and increases at each level.
Energy flows through the organisms from tops to bottom and decreases at each level.
The diagram below shows a simple food web. Which animal is classified as an omnivore?
red fox
deer
black bear
rabbit
Decomposers are important in the food chain because they
produce their own food using light from the sun
stop the flow of energy from one organisms to another
break down dead organisms and recycle into the soil
are microscopic and other organisms cannot consume them
The diagram below shows a marine food chain. The zooplankton in this food chain are
primary producer
primary consumer
secondary consumer
tertiary (third) consumer
Use the food chain below to answer the following question. What do the arrows in the food chain indicate about the flow of energy in an ecosystem?
Energy is continuously recycled by the organisms in an ecosystem
Energy flows in one direction in an ecosystem from producers to consumers
More of the available energy in an ecosystem is given to large animals that to small animals
Organisms at the end of the food chain receive more energy that those at the beginning
Use the food web below to answer the following question. Which group is NOT represented in the food web?
producers
primary consumers
secondary consumers
decomposers
