Hemichordates Differ from Echinoderms in That

question 2

Multiple Choice

Hemichordates differ from echinoderms in that

• A) echinoderms do not have a bilaterally symmetric stage.
• B) hemichordates have bodies composed of three parts.
• C) adult echinoderms have a head.
• D) adult echinoderms have an anterior-posterior body plan.
• E) adult hemichordates have radial symmetry.

---

Definitions:

Unexpected Panic Attacks

Sudden episodes of intense fear or discomfort that arise without warning and without an apparent trigger.

Panic Attacks

Sudden episodes of intense fear or anxiety, often accompanied by physical symptoms such as heart palpitations, shortness of breath, or dizziness.

Specifiers

Further descriptors of a patient’s condition that capture the natural variation in the expression of affective disturbances, and therefore increase the specificity of diagnoses by conveying important information about salient features that might be otherwise overlooked. For example, one specifier used in conjunction with a diagnosis of major depressive disorder is “with melancholic features.”

Specific Phobia

An intense, irrational fear of specific objects, situations, or activities that poses little to no actual danger.