Leeches
A) have a fixed number of somites.
B) respire through gills.
C) lack excretory organs.
D) have a permanent clitellum.
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Q25: Echiurans
A)live in fresh water.
B)have a proboscis used
Q26: Most annelids possess tiny bristles called _.
Q27: The paired appendages used for locomotion in
Q28: Some typical leech characteristics are as follows:
A)anterior
Q29: In the annelids,each internal compartment is lined
Q31: Movement in annelids involves
A)longitudinal muscles only.
B)circular muscles
Q32: The cocoon in the earthworm is produced
Q33: The clam worm gets food by
A)using its
Q34: Current medical uses of annelids involve
A)flatworms.
B)leeches.
C)polychaetes.
D)freshwater oligochaetes.
Q35: Annelids are thought to be related to
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