Question

The first segment of annelids is

• A. Prostomium
• B. Peristomium
• C. Prestomium
• D. Poststomium

Answer 1

The correct option is B Peristomium

The first body segment is the peristomium which surrounds the mouth and the prostomium. In a mature worm, the segments 14-16 are covered by a prominent dark band of glandular tissue called clitellum. The body is divisible into three prominent regions pre-clitellar, clitellar and post - clitellar regions.

So the correct answer is 'Peristomium'.