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The posterior sucker of a leech is formed by the fusion of how many segments?
AThe last five segments
BThe last seven segments
CThe first five segments
DThe last three segments
Answer & Solution
Correct answer: B. The last seven segments
1. A leech has two suckers, anterior and posterior.
2. The posterior sucker is formed by the fusion of the last seven segments.
3. So seven is correct.
4. The anterior sucker occupies the first five segments, which is the trap option.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 13 Structural Organisation of Animals "Suckers", p.195_
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