Question

One very special feature in the earthworm pheretima is that :

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

Answer 1

Answer: (B)

the typhlosole greatly increases the effective absorption area of intestine

Answer 2

From the $27^{th}$ segment upto $23-25$ segments in front of the anus in intestine of earthworm, lies a highly glandular and vascular part called typhlosole. It greatly increases the effective absorption area for digested food in the intestine