What is the function of the clitellum in the reproductive system of annelids?

• A. It secretes a mucus ring for egg fertilization.
• B. It stores eggs until they are ready to be fertilized.
• C. It produces sperm for reproduction.
• D. It acts as a sensory organ for detecting mates.

Answer: (A)

Verified step by step guidance

1. Identify the organism in question: Annelids, which are segmented worms, such as earthworms.
2. Understand the role of the clitellum: It is a thickened, glandular section of the body wall in earthworms and other annelids.
3. Recognize the primary function of the clitellum: It secretes a mucus ring during reproduction.
4. Explain the process: The mucus ring forms a cocoon around the worm's body, which collects eggs and sperm as the worm wriggles out of it.
5. Clarify the outcome: The cocoon, containing fertilized eggs, is then deposited in the soil where the young worms will eventually hatch.