alleryHow many pairs of eyes are present on the dorsal side of a leech?
ATwo pairs
BThree pairs
CFive pairs
DSeven pairs
Answer & Solution
Correct answer: C. Five pairs
1. The receptors of the leech lie on its dorsal side.
2. There are five pairs of eyes located on the first five segments.
3. So five pairs is correct.
4. The seven count refers to the segments fused to form the posterior sucker, so it is the trap.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 13 Structural Organisation of Animals "Receptors", p.195_
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