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Name:______________________________
Date:__________________
Organism Interactions Quiz
Answer the following questions. Be sure to do the explanation portions of the
questions. Remember to use complete sentences to express your thoughts.
Indicate your answers by highlighting or changing your font color. When you
finish, save your work as “interactionsquiz(yourname)” to the groups drive “glass
3rd”. Also put your name on the actual quiz. Good luck 
1. Some plants require nitrogen and phosphorus but cannot absorb these nutrients
effectively from the soil. They obtain these nutrients through fungi that live in
their roots. The fungi have access to carbohydrates manufactured by the plants.
Without fungi, the plants would not be healthy or abundant.
This is an example of how ___________ relationships maintain balance within an
ecosystem.
A. competitive
B. abiotic
C. divergent
D. symbiotic
Explain the effects on the plants mentioned in the question and other organisms
in the food chain.
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2. Many plants depend on insects, such as moths, bees, wasps, and beetles, to
perform pollination so they can reproduce. The insect pollinator receives nectar
or pollen for food from the flower. This symbiotic relationship between
pollinators and plants is known as _________________.
A. commensalism
B. parasitism
C. predation
D. mutualism
3. Which of the following is an example of parasitism?
A. a pack of wolves hunts, kills, and consumes a white tailed deer for energy
B. A field mouse and rabbit compete for energy sources
C. A bird builds a nest in the limb of a tree
D. A tapeworm lives in the intestines of a cat absorbing its nutrients
Explain how your choice is an example of parasitism
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4. A cheetah hunts kills and eats a gazelle. This type of interaction is called
____________.
A. predation
B. mutualism
C. parasitism
D. commensalism
5. The American bullfrog is native to much of the Eastern United States. The
species has successfully spread west as an invasive species. It thrives in the
western US due to its large size, high mobility, and reproductive success.
American bullfrogs have generalized eating habits and often eat the same foods
as native frog species in the western US causing a reduction of the food supply.
The relationship between the American bullfrog and native frog species in the
west is known as _________________.
A. mutualism
B. predation
C. parasitism
D. competition
6. For one week, Jacob observed the behavior of a particular bird near his home.
During this time, he noticed that the bird spent much of its time engaging in 4
activities:
I. chirping at other birds
II. Fighting off other birds
III. Eating alone in its nest
IV. flying with other birds in a particular pattern
Which of these behaviors is a social behavior?
A. I, II, and III only
B. I, II, and IV only
C. IV only
D. III only
7. Lions and tigers are similar creatures but lions live in groups called prides while
tigers live solitary lives.
What might be an advantage to a tiger living a solitary life over a lion living in a
pride?
A. The tiger will have more help raising its cubs
B. The tiger will be able to capture larger animals for food
C. The tiger will have fewer threats to its cubs from others of its species
D. The tiger will have more protection from other species
Explain what a disadvantage to the tiger might be
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8. Sometimes bees will perform what is known as a “waggle dance” as a means of
communicating with another bee. What is the purpose of this behavior?
A. to attract a mate
C. to distinguish from the enemy
B. To kill other bees
C. to help bees cooperate
9. Populations of prey animals, such as deer, might exceed the carrying capacity of
their ecosystem if top predators, such as mountain lions, are removed.
Without mountain lions, increased numbers of deer may reduce the food supply
for other herbivores, such as mice and crickets. As a result, populations of deer,
mice, and crickets might decline.
This example implies that a properly functioning predator/prey relationship:
A. maintains balance within an ecosystem
B. can throw an ecosystem out of balance
C. harm all of the organisms in an ecosystem
D. result in a food shortage for the entire ecosystem
Explain what may happen to the secondary consumers that feed on the deer, mice
and crickets
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10. Barnicles living on whales would be an example of:
A. commensalism
B. mutualism
C. parasitism
D. predation