Which term is used for the reproductive region that forms cocoons in earthworms?

Which term is used for the reproductive region that forms cocoons in earthworms?

• A. Clitellum
• B. Reproductive structures
• C. Intestine
• D. Waste removal tubes

Answer: (A)

The term you’re looking for is the clitellum. This is a thickened, glandular band of segments that encircles the earthworm just behind the head. During reproduction, the clitellum secretes mucus and a cocoon that slides forward along the worm’s body, capturing eggs and sperm from the two mating partners to form a protective egg cocoon. After fertilization, the cocoon eventually slips off the worm and the young hatch inside it. The other options don’t fit because they refer to broader or different body parts: a general “reproductive structures” label is too vague, the intestine is part of the digestive system, and the waste removal tubes are nephridia involved in excretion, not cocoon formation.

The term you’re looking for is the clitellum. This is a thickened, glandular band of segments that encircles the earthworm just behind the head. During reproduction, the clitellum secretes mucus and a cocoon that slides forward along the worm’s body, capturing eggs and sperm from the two mating partners to form a protective egg cocoon. After fertilization, the cocoon eventually slips off the worm and the young hatch inside it.

The other options don’t fit because they refer to broader or different body parts: a general “reproductive structures” label is too vague, the intestine is part of the digestive system, and the waste removal tubes are nephridia involved in excretion, not cocoon formation.