Question

Hemichordates have one chordate feature in its typical form

• A. Perforated pharynx
• B. Buccal diverticulum
• C. Three types of coelom
• D. Ciliated integument

Answer 1

The correct option is B Buccal diverticulum

Hemichordata constitute worm-like marine invertebraes. The term Hemichordata—from the Greek hemi, meaning “half,” and chorde, meaning “string,” thus, “half-chordate”—was first proposed because the buccal diverticulum, a tubular outgrowth from the mouth cavity forward into the proboscis, or “snout,” resembled a rudimentary notochord. The diverticulum bears little resemblance in origin and function to the vertebrate notochord. So, the correct answer is option B.