Relationships in an Ecosystem

Match

Match each term its most accurate description.

• A relationship between two species in which both species benefit.

• A relationship between two organisms in which one benefits and the other one is unaffected.

• A relationship between two species in which one species, the parasite, benefits from the other species, the host, which is harmed.

Mutualism

Commensalism

Parasitism

• Mutualism

• Commensalism

• Parasitism

Match

Match each term its most accurate description.

• An organism that kills and eats all or part of another organism.

• An organism that is killed and eaten by another organism.

• Ecological relationship in which two or more organisms depend on the same limited resource.

Predator

Prey

Competition

• Predator

• Prey

• Competition

Multiple Choice

Which statement correctly explains a symbiotic relationship?

• Mutualism is a relationship in which intestinal bacteria produce Vitamin K in humans.

• Commensalism is a relationship in which a blood-sucking mosquito feeds on the blood of a dog.

• Parasitism is a relationship in which a spider crab is camouflaged with seaweed on its back.

• Predation is a relationship in which a plant grows taller in bright sunlight than in a shaded area.

Multiple Choice

Many citrus grove managers set up honeybee hives to pollinate orange blossoms. Which best describes the ecological relationship between the honeybees and orange trees?

• Parasitism

• Mutualism

• Predator-Prey

• Competition

Multiple Choice

A deer caught and eaten by a Florida panther is an example of what ecological relationship?

• Parasitism

• Mutualism

• Predator-Prey

• Commensalism

Multiple Choice

Which of the following does NOT correctly exemplify competition?

• Two hyenas that are fighting over prey

• Two zebras eating grass in the same area

• Two plants growing in the forest canopy

• Two lions hunting different prey, side-by-side

Multiple Choice

Which type of relationship is most likely represented in the graph?

• The relationship is predator–prey where species X represents the wolves, and species Y represents the rabbits.

• The relationship is predator–prey where species X represents the rabbits, and species Y represents the wolves.

• The relationship is commensalism where species X represents the rabbits, and species Y represents the wolves.

• The relationship is commensalism where species X represents the wolves, and species Y represents the rabbits.