A. spiracles of insects
B. trachea of toads
C. pharynx of man
D. liver of man
E. scales of fish
Correct Answer:
Option A – spiracles of insects
A. spiracles of insects
B. trachea of toads
C. pharynx of man
D. liver of man
E. scales of fish
Correct Answer:
Option A – spiracles of insects
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