​Of the Following Invertebrate Groups, the Group Most Closely Related

question 21

Multiple Choice

​Of the following invertebrate groups, the group most closely related to the chordates is the _____.

• A) ​annelids
• B) ​mollusks
• C) crustaceans​
• D) ​echinoderms
• E) cnidarians​

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Definitions:

Right Half

An ambiguous term potentially referring to the right side of a bilateral organism or structure, requiring context for precise definition.

Cerebrum

The biggest section of the brain, tasked with managing voluntary muscle movements, sight, language, flavor, auditory perception, cognition, and memory retention.

Subarachnoid Space

The space between the arachnoid membrane and pia mater around the brain and spinal cord, filled with cerebrospinal fluid.

Dural Venous Sinus

A channel through which venous blood drains from the brain and meninges back towards the heart.