Question

In earthworm, the septal nephridia begin from behind ........... segment.

• A. 18
• B. 17
• C. 15
• D. 13

Answer 1

The correct option is C 15

Nephridia remove metabolic wastes from an animals body just like vertebrate kidneys. In an earthworm, the septal nephridia occur in segment 15 onwards and are attached to septa. It is open internally and varies from 80 to 100 per segment. It removes metabolic wastes from the blood and coelomic fluid and is largest in size.

So, the correct answer is '15'.