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WorksheetsEcology Part 1 Review
Total questions: 14
Worksheet time: 9mins
In this food chain, how many types of primary consumers (herbivores) are included?
0
1
2
3
How do you think this food web would be affected if the plants were eliminated?
Only the fungi would survive.
Birds and nematodes would thrive.
The food web would completely collapse.
The food web would produce more bacteria to compensate.
Guide to food chain (top to bottom): osprey, pike, perch, smelt, freshwater shrimp. Which population would show the quickest increase if perch were eliminated from the food chain ?
pike
smelt
osprey
freshwater shrimp
In 1859, two dozen rabbits were introduced to Australia. By 1953, there were an estimated one billion rabbits in Australia. The addition of the rabbits to this established ecosystem caused many problems, including a huge decrease in native plants. This left little food for native animals. This is an example of how
diversity improves an established ecosystem.
genetic variation leads to the formation of a new species.
the introduction of non-native species upsets a balanced system.
changing in one part of a system does not affect other parts of the system.
Populations of organisms that are introduced into a new habitat and reproduce very rapidly are known as _____________ species.
endemic
predatory
invasive
parasitic
All energy in any ecosystem starts as
carbohydrates.
electricity.
sunlight.
water.
Which of these organisms is a part of the group that produces all of the available energy in a food web?
Fly
Grass
Mouse
Sun
The natural environment where any species lives is called its
biome.
community.
ecosystem.
habitat.
In the mid-1980's, zebra mussels were introduced into the Great Lake region of the United States where they rapidly reproduced; females can produce up to one million eggs per year. All BUT one situation would be a problem caused by the introduction of this invasive species. That is
damage to boats, harbors, and docks.
helping other species of mussels thrive and grow in size.
damage to water treatment plants by clogging up the intakes.
out competing native species for food, leading to a decrease in their population.
Human activities can alter an ecosystem and bring about the extinction of a species. Such activities include any of these except
hunting a species to extinction.
assuring a habitat remains unharmed.
introducing toxic compounds into food webs.
introducing a new species into an environment.
All of the squirrels, grass, oak trees, and turtles in a forest would be considered a
community.
habitat.
population.
species.
This is the pond behind Serge's house.
What answer choice describes a community?
the pond
all the catfish in the pond
rushes and irises, the dragonflies and mosquitoes, the catfish
all the non-living parts of the pond, water, oxygen, sand, rocks
What is NOT an impact that an invasive non-native species has on an ecosystem?
change food webs
decrease biodiversity
prey on native species
improves ecosystem productivity and overall health
All but one of the factors may cause an animal species to be placed on the endangered list. The factor that does NOT directly contribute to the endangered status is
pollution from human sources.
habitat loss because of city construction.
introduction of non-native animals to the range of the animal.
introduction of the animal into places that it has previously gone extinct.
