7th Flow of Energy Test

Trapping (or rabbit hunting) has severely reduced the population of rabbits in an ecosystem as shown in the bar graph. What is the most likely effect this will have on other organisms?

• The snake population will decrease while the grass population will increase

• The haw population will increase and the rabbit population will decrease

• The grass population will decrease and the snake population will increase

• The grass, rabbit, snake, and hawk populations will all decrease rapidly

Which organisms are heterotrophs?

• photosynthesizers

• producers

• consumers

• plants

In this food web, the gray fox is a...

• Primary Consumer

• Secondary Consumer

• Both a Primary Consumer and a Secondary Consumer

• Producer

What would happen to this food chain if we doubled the population of the rabbits?

• The populations of the snakes and hawks would also increase.

• The populations of the grass, snakes, and hawks would decrease.

• The grass population would decrease. The snake and hawk population would increase.

• The grass and hawk population would decrease. The snake population would increase.

Which most likely caused the rabbit population (light green line) to decrease over the first time unit (0 to 1) in the graph?

• A disease in the rabbit population

• A decrease in the amount of grass available

• A decreasing population of hawks

• A higher population of snakes than normal

A consumer that eats both animals and producers.

• Carnnivores

• Omnivores

• Herbivores

Which type of interaction exists between shrimp and blue crabs in this food web?

• Blue crabs prey on shrimp.

• Shrimp compete with blue crabs for food.

• Shrimp help blue crabs filter polluted water.

• Shrimp decompose matter for blue crabs.

A consumer that eats only plants is a(n) ____.

• carnivore

• omnivore

• herbivore

• tertiary consumer

Maggots feed on dead and decaying organisms for energy. What are maggots?

• autotrophs

• producers

• decomposers

• heterotrophs

Which level does energy flow directly to after the producer level?

• Decomposer

• Producer

• Primary consumer

• Secondary consumer