Question

Special feature of Pheretima is

• A. S - shaped setae are defensive weapons against enemy
• B. It has long, dorsal tubular heart
• C. Fertilization of eggs occurs inside the body
• D. Typhlosole increases effective absorptive area for digested food

Answer 1

The correct option is D Typhlosole increases effective absorptive area for digested food

In Pheretima pair of a short and conical intestinal caecae project from the intestine on the 26th segment. The characteristic feature of the intestine after 26th segment except the last 23rd-25th segments is the presence of an internal median fold of dorsal wall called typhlosole. This increases the effective area of absorption in the intestine.

So the correct answer is 'Typhlosole increases the effective absorptive area for digested food'.