Which one of the following structures in Pheretima is correctly matched with its function ?
- Gizzard - absorbs digested food
- Setae - defence against predators
- Typhlosole - storage of extra nutrients
- Clitellum - secretes cocoon
Answer
(4) Clitellum - secretes cocoon
Solution
Gizzard helps in grinding the soil particles and decaying leaves; it does not absorb food.
Setae help in locomotion.
Typhlosole increases the effective area of absorption in the intestine.
Clitellum secretes the cocoon in which the fertilised eggs are deposited.
∴ Clitellum - secretes cocoon is correctly matched.
Answer: (4)