Food Chains/Food Webs Quiz

Clownfish usually live within sea anemones, whose tentacles sting and paralyze most fish that touch them. The clownfish, which are not harmed by the tentacles, gain protection from predators and feed on the waste matter left from the anemone’s meals. The clownfish protect the sea anemones from some of their predators and parasites. The relationship between clownfish and sea anemones is ____.

• competition
• b. carrying capacity
• c. parasitism
• d. mutualism
• e. commensalism

A relationship between the same species in which both compete for limited resources

• Symbiosis
• interspecific competition
• species richness
• intraspecific competition

This interaction occurs when lions, cheetahs, and leopards all compete for the same food source.

• predation
• interspecific competition
• mutualism
• intraspecific competition

Mullet are local estuarine fish that move in schools and feed on plankton and plant matter. Natural predators of the mullet include spotted sea trout, sharks, pelicans and dolphins. The graph below shows how the number of mullet in an area has changed over time. Based on the data, one student concludes that a new predator was introduced into the area during this time period. Which of the following is a likely alternate explanation for the change in the mullet population?

• A. mullet prey increased in the area
• B. mullet parasites decreased in the area
• C. the temperature of the area increased
• D. the amount of aquatic plants in the area decreased

In _______________, one species benefits and the other is neither helped nor harmed.

• Commensalism
• Parasitism
• Mutualism
• Predation

Trace a food chain found on this food web.

• algae--> Water fleas--> frog--> mosquito larvae
• rotifers--> water fleas--> water boatman--> catfish
• heron--frog--> water boatman-->water fleas--> algae
• rotifers--> water fleas-->catfish--frog

Grass--> locust--> snakes--> eagles In this food chain, what would happen if half the snakes died due to a viral disease?

• grass numbers would decrease, locust numbers would increase & eagle numbers would decrease
• grass numbers would decrease, locust numbers would increase & eagle numbers would increase
• grass numbers would increase, locust numbers would decrease & eagle numbers would decrease
• grass numbers would increase, locust numbers would increase & eagle numbers would decrease

If grass stores 1,000 energy units received from the sun and the trophic levels are grass-->cow-->human, how many units of energy does the human receive of the original 1,000 units?

• 10
• 100
• 200
• 900

On this energy pyramid, if the grass produced 1,000 kcal of energy, what amount of energy would the bird get?

• 100 kcal
• 10 kcal
• 1 kcal
• .1 kcal

The diagram shows organisms feeding on a dead rat and one of the organisms which, in turn, feeds on them. What is needed to complete the food chain?

• consumer
• carnivore
• producer
• predator