SAT II Biology E : Trophic Levels and Energy Flow
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Example Questions
Example Question #1 : Species Relationships
Which of the following is an example of primary consumers?
Foxes eating squirrels
Fungi that gain energy from detritus
Grass
Deer eating grass
Algae
Deer eating grass
A primary consumer is any animal that consumes primary producers (autotrophs). Autotrophs consist of any creatures that create their own energy (in the form of sugars) from sunlight. Grass and algae would be considered autotrophs. Deer are the only animals shown here that consume autotrophs and are, therefore, primary consumers.
Example Question #1 : Ecology
Which of the following is not a primary producer?
Kelp
Mosses
Mushrooms
Grasses
Ferns
Mushrooms
A mushroom is a decomposer and not a producer. All of the other options are photosynthetic producers.
Example Question #1 : Trophic Levels And Energy Flow
Which of the following would be considered a primary consumer?
Grass
Hawk
Rabbit
Fungus
Snake
Rabbit
A primary consumer is a herbivore that consumes only producers or autotrophs. For this question, rabbits only eat plants and so they would be considered the primary consumers. Grass and other organisms that can manufacture their own food are classified as primary producers. Snakes and hawks hunt other animals (such as rabbits) for food, so they must be at least secondary consumers. Fungi break down dead organisms for nutrition and are thus classified as decomposers.
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