When Wolves Were Returned to Yellowstone National Park in 1995

question 47

Multiple Choice

When wolves were returned to Yellowstone National Park in 1995, some of the effects noted were increasing levels of berries available to black bears, stabilization of stream banks, increased nesting habitat for birds, and increasing beaver numbers as a result of rejuvenating aspen trees. These were later determined to be the results of reduced numbers and altered feeding behavior of elk as they were preyed upon by the wolves. Given this information, which of the following best describes wolves in Yellowstone National Park?

• A) They are a primary consumer.
• B) They are an ecosystem engineer.
• C) They are a foundation species.
• D) They are a keystone species.

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Definitions:

Right Parietal Lobe

Part of the brain located on the right side of the parietal cortex, important for processing sensory information and spatial orientation.

Primary Motor Cortex

The primary motor cortex is a region of the brain's cerebral cortex involved in planning, controlling, and executing voluntary movements.

Largest Area

A term that can refer to the area with the greatest extent or size in a given context, such as the largest geographic area of a country or the largest surface area of a solid object.

Representation

The action of speaking or acting on behalf of someone or the depiction of something in a particular way.