One very special feature in the earthworm pheretima is that

Options

A. the typhlosole greatly increases the effective absorption area of the digested food in the intestine
B. the S-shaped setae embedded in the integument are the defensive weapons used against the enemies
C. it has a long dorsal tubular heart
D. fertilisation of eggs occurs inside the body

Answer

A

Explanation

A pair or short and conical intestinal caecae project from the intestine on the 26th segment. The characteristic feature of the intestine between 26-35 segments is the presence of internal median fold of dorsal wall called typhlosole.
This increases the effective area of absorption in the intestine.