Question

According to the food web given below, the bear is a:

• A. Primary consumer
• B. Secondary consumer
• C. Both primary and secondary consumer
• D. Primary, secondary and tertiary consumer

Answer 1

The correct option is D Primary, secondary and tertiary consumer

When the bear eats berries, its a primary consumer as it directly feeds on plants.
When it eats rodents, it becomes a secondary consumer. Rodents feed on grass, so rodents are the primary consumers in that particular food chain.
When the bear eats a salmon, the bear is functioning as a tertiary consumer as salmons are secondary consumers that feed on zooplankton (primary consumers). These zooplanktons feed on phytoplanktons which are the producers of an aquatic ecosystem.