The Keystone Species in a Pacific Northwest Old Growth Forest

question 32

Multiple Choice

The keystone species in a Pacific Northwest Old Growth Forest

• A) is the Spotted owl, that preys on rodents.
• B) are the mice that feed on mushrooms and truffles.
• C) are the Douglas fir trees that are dominant species.
• D) are the Douglas squirrels that spread the seeds of the Douglas fir.
• E) are the piliated woodpeckers that nest in Douglas fir.

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Definitions:

Autonomic Nervous System

The autonomic nervous system is part of the peripheral nervous system that controls involuntary bodily functions, including heart rate, digestion, and respiratory rate.

Fight-or-Flight Response

The body's automatic, physiological reaction to perceived threats or emergencies, preparing an individual for fighting or fleeing.

Recording Electrodes

Devices used to detect electrical activity in the body, such as brainwaves or heart activity, by recording the electrical potential changes over time.

Scalp

The skin covering the skull, often bearing hair, which provides protection and supports sensory input.