Ecosystem Relationships And Food Chains 8.11A Question Preview (ID: 41235)

A. TEACHERS: click here for quick copy question ID numbers.

Which statement best describes relationships that exist in a food web?
a) There is always a larger population of predators that prey on animals in a food web.
b) Consumers can live independently of producers, but prey animals must have predators to survive
c) Parasites can live independently of hosts, but consumers must have producers to survive.
d) Producers can live independently of consumers, but predators must have prey to survive.

Which relationship best describes the interaction between a tapeworm and a human intestine?
a) producer and consumer
b) predator and prey
c) parasite and host
d) biotic and abiotic

Where does the mouse population get its energy?
a) Nuts
b) Wolf
c) Nectar
d) Deer

A science student observes the interaction of crickets and ants outside the school. Ants surround, cover, and eat crickets. What relationship exists between ants and crickets?
a) Crickets-predator, ants-prey
b) Crickets-producer, ants-consumer
c) Crickets-parasite, ants-host
d) Crickets-prey, ants-predator

Rabbits eat lettuce and carrots. What type of relationship do carrots and rabbits have?
a) predator/prey
b) parasite/host
c) producer/consumer
d) predator/host

A parasite enters the food web and causes disease in the toad population. The skunk's sole source of energy is the toad. What impact could this have on the skunk population over time?
a) Some skunks die.
b) Some skunks move.
c) Some skunks adapt.
d) All of the above.

Predators and parasites both cause harm to other organisms. What is a difference between predators and parasites?
a) Predators only harm producers, while parasites only harm consumers.
b) Predators harm their young, while parasites do not.
c) Predators only kill at night, while parasites only kill during the day.
d) Predators eat organisms, while parasites live off of organisms.

What organism represents a parasite in a terrestrial ecosystem food web?
a) baboon
b) snake
c) locust
d) tick

The Center for Disease Control publishes articles explaining the causes of seasonal West Nile virus. Research proves mosquitoes in freshwater ecosystems spread the disease to other organisms. How do they transmit the virus to other organisms?
a) Mosquitoes transmit the virus when they land on the skin of an organism.
b) Mosquitoes transmit the virus as parasites which feed on the blood of host organisms and inject the virus during feeding
c) Mosquitoes transmit the virus by preying on organisms and spreading the virus on contact.
d) Mosquitoes transmit the virus as hosts who feed on the blood of organisms and inject the virus during feeding.

Leopards eat baboon and impalas in a terrestrial ecosystem. What prediction can be made if the baboon population begins to decrease because of disease?
a) The leopard population will increase.
b) The impala population will decrease.

What relationship exists between seed-eating birds and grass?
a) predator/host
b) consumer/producer
c) parasite/host
d) consumer/consumer

A group of students designs predator/prey models. Which model accurately represents this relationship?
a) Paper mache replica of grasshoppers living in grass
b) Drawing of a mouse hiding in the grass
c) Diorama of a cougar chasing a deer
d) Shoebox ecosystem with deer and rabbits

Hawks are predator to small organisms such as snakes, rabbits, and mice. What is a possible result of adding a hawk to an ecosystem?
a) The rabbit population will increase.
b) The grass population will increase.
c) The cougar population will increase.
d) All of the above.

A student wants to list the producer/consumer and predator/prey relationships in an ecosystem. What would be the best way to organize these interactions?
a) Food chain
b) Food web
c) Outline
d) None of the above

Students are given cards containing information about several predator/prey and parasite/host relationships. Which question could be the focus of a comparative investigation?
a) How does natural selection influence predator/prey relationships?
b) How do predators and hosts interact with abiotic factors?
c) In what ways is the parasite/host relationship similar to the predator/prey relationship
d) What effect do parasite/host relationships have on populations of producers?

In groups, students create dioramas to depict freshwater ecosystems. What is an advantage of using dioramas to study ecosystems?
a) Dioramas are accurate tools that measure environmental changes.
b) Dioramas provide information about organism interactions within an ecosystem.
c) Dioramas are accurate tools for collecting data about organism interactions.
d) Dioramas provide information about environmental changes.

Play Games with the Questions above at
To play games using the questions from above, visit and enter game ID number: 41235 in the upper right hand corner or click here.

Log In
| Sign Up / Register