alleryThe 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_
Keep practising Unit 7C1: Evolution & Animal Structural Organisation
Browse all Unit 7C1: Evolution & Animal Structural Organisation questions for AP Biology, or explore more Biology topics.
Related questions
Which pair of features is characteristic of phylum Aschelminthes?An animal has a body plan that is diploblastic, radially symmetrical and lacks a coelom. TWhich of the following is NOT correctly matched with its phylum?Cnidarians that exhibit polyp and medusa alternating in the life cycle (Metagenesis) incluIn sponges the cells lining the spongocoel and canals areThe correct sequence of increasing organisational complexity in Animalia isBioluminescence — the ability of a living organism to emit light — is well-marked in membeParapodia used for locomotion in the aquatic annelid Nereis are best described as