The role of scolex in tapeworm is to

Analyze the question: It asks about the function of the scolex in a tapeworm (e.g., Taenia solium, Taenia saginata).

Concept: A tapeworm is an endoparasite that lives in the intestine of its host. Its body has two main parts:

• Scolex (head): has hooks and suckers.
• Proglottids (segments): make up the rest of the body. They absorb food and contain the reproductive organs.

Because the tapeworm lives in the gut, where food and fluid are constantly moving, it needs a firm anchor to avoid being swept out of the body.

Solution:

1. Excretion (A): Waste is removed by flame cells in the proglottids, not by the scolex.
2. Attachment to the host (B): The scolex has hooks and suckers that grip the intestinal wall. This is its main role.
3. Movement (C): Tapeworms are largely stationary once attached, and the scolex is not used for locomotion.
4. Breathing (D): Tapeworms respire anaerobically and absorb what they need through the body surface. The scolex has no role in this.

Exam tip: Remember "Scolex = Stick". The scolex sticks the worm to the host with hooks and suckers. Proglottids are for absorbing food and reproducing.