A) fish and frog
B) frog and earthworm
C) leech and earthworm
D) fish and earthworm
Correct Answer: C
Solution :
The body of annelids is covered by thin moist cuticle. Gaseous exchange occurs through general body surface in most forms. In frogs the breathing is cutaneous, pulmonary and buccopharyngeal. In fishes the breathing is through gills.
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