Practice!

Sample Problem

Below is an image of a food web.

In this ecosystem, the snake is which of the following? (Check all that apply.)

A. primary consumer

B. secondary consumer

C. tertiary consumer

D. producer

Solution

The snake is both a secondary and a tertiary consumer. Energy is transferred from the grass to the mouse to the snake, making it a secondary consumer. Energy is also transferred from the grass to the grasshopper to the mouse to the snake, making it a tertiary consumer.