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- 1. Multiple Choice
In some grassland ecosystems, lions are predators that consume zebras. In several estuary ecosystems, fish lice are parasites that consume the blood of fish. How are these two relationships of predation and parasitism similar?
Only one organism in each relationship
dies.
Both organisms in each relationship are
harmed.
Only one organism in each relationship benefits.
Neither organism in each relationship is
harmed.
- 2. Multiple Choice
Lichens in a forest ecosystem are made up of fungi and algae living together. The fungi benefit from food produced by the algae. The algae benefit from nutrients and water absorbed by the fungi. Which of the following relationships in different ecosystems is most similar to the interaction of the fungi and algae?
mutualism between fungi and ants
parasitism between fungi and humans
commensalism between birds and trees
competition between algae and aquatic plants
- 3. Multiple Choice
Remoras are small fish that attach to sharks but do not harm them. When sharks tear prey apart, remoras eat the leftovers. What relationship do remoras have with sharks?
mutualism
parasitism
predator-prey
commensalism
- 4. Multiple Choice
Hummingbirds share a mutualistic relationship with the flowers they feed on. Which of these statements about the symbiotic relationship between the flower and the hummingbird is true?
Both the flower and the hummingbird are helped.
Both the flower and the hummingbird are harmed.
The flower is harmed, and the hummingbird is helped.
The flower is helped, and the hummingbird is harmed.
- 5. Multiple Choice
Honeybees are important pollinators of flowers. Mites that live in the bodies of bees can attack honeybee colonies. Some birds, amphibians, and insects eat honeybees. Which of the following relationships is not included in the description above?
parasitism
mutualism
commensalism
predator-prey
- 6. Multiple Choice
One relationship between organisms is that of predator-prey. Which of the following is the best description of a predator?
An organism that participates in symbiosis
An organism that eats
another organism.
An organism that is eaten by
another organism
An organism that benefits at the expense of another organism.
- 7. Multiple Choice
In a relationship between two organisms, sometimes one organism is predator and the other is prey. Which of the following is the best description of prey?
An organism that another organism benefits from.
An organism that eats
another organism
An organism that is eaten by another organism
An organism that is harmed by another organism.
- 8. Multiple Choice
Small birds called Egyptian plovers sometimes get their food by picking it off the hides of crocodiles. For this reason, they are also known as crocodile birds. Which kind of relationship do crocodiles and Egyptian plovers have?
predator-prey
commensalism
parasitism
mutualism
- 9. Multiple Choice
What causes competition among organisms?
One organism tries to live on or in the other organism.
Both organisms attempt to
use the same limited resources.
Both organisms try to take
on the form of the other.
One organism tries to prey
on the other organism.
- 10. Multiple Choice
Which of the following relationships is most like the predator-prey relationship?
parasitism
symbiosis
mutualism
commensalism
- 11. Multiple Choice
Which of the following describes the relationship between a hermit crab and the organism that used to live in the shell the hermit crab now lives in?
mutualism
commensalism
parasitism
competition
- 12. Multiple Choice
Which of the following is an example of a predator-prey relationship?
A fox is a predator, and a
bear is its prey.
A mouse is a predator, and a fox is its prey.
A plant is a predator, and a
fox is its prey.
A fox is a predator, and a
rabbit is its prey.
- 13. Multiple Choice
Which of these statements shows that hermit crabs and anemones have a relationship of mutualism?
Hermit crabs and anemones live in the same ecosystem and can eat similar organisms.
Anemones can move on their own by using their tentacles and pedal disk. The pedal disk is on the side of the anemone that is opposite its mouth.
Anemones cannot move very quickly, but they can sting predators. When an anemone is riding on a hermit crab’s back, the anemone protects the crab from predators
When hermit crabs grow too big for a shell, they leave it behind and move to a larger shell. If an anemone has attached itself to the old shell, the hermit crab will move the anemone to its new shell.
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