Explain how some heterotrophs could be described as either a primary consumer or a secondary consumer.

Omnivorous animals can be described as a primary consumer or a secondary consumer.

Explanation:

Some heterotrophs can derive their nutrition from plant sources and animal sources both. These organisms are called omnivorous animals. When an omnivorous organism derives its nutrition from plant sources, it serves as a primary consumer. On the other hand, when the same omnivorous organism derives its nutrition from animal sources, it serves as a secondary consumer. Squirrels and rats are examples of such heterotrophs.