Multiple choice Which of the following is not a characteristic feature of Hemichordates? Body is bilaterally symmetrical. The organisms respire through gill slits. The organisms are aquatic. Notochord is limited to anterior region of body. Body is divided into proboscis, collar and trunk. Reveal answer Fill a bubble to check yourself C Correct answer Explanation Hemichordates are marine worm-like animals found in muddy water in coastal areas.