Among Vertebrates, the Unique Feature of Lampreys and Hagfish Is

question 15

Multiple Choice

Among vertebrates, the unique feature of lampreys and hagfish is the ________.

• A)presence of a cartilaginous skeleton
• B)absence of a backbone
• C)absence of jaws
• D)absence of a post-anal tail

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Definitions:

Compulsions

Repetitive behaviors or mental acts that a person feels driven to perform in response to an obsession, often to reduce distress or prevent a feared event.

Obsessive-compulsive Disorder

A mental health disorder characterized by uncontrollable, recurring thoughts (obsessions) and behaviors (compulsions) that the individual feels the urge to repeat over and over.

Agoraphobia

An anxiety disorder characterized by an intense fear of being in situations where escape might be difficult or help wouldn't be available if a panic attack occurs.

Panic Disorder

A psychiatric disorder characterized by sudden episodes of intense fear or anxiety and physical symptoms based on a perceived threat rather than imminent danger.