Q.

Syrinx is the voice box in -

A. Amphibians
B. Reptiles
C. Birds
D. Mammals
Answer» C. Birds
Explanation: Syrinx is the name for the vocal organ of birds. Located at the base of a bird's trachea, it produces sounds without the vocal cords of mammals. The sound is produced by vibrations of some or all of the membrana tympaniformis (the walls of the syrinx) and the pessulus caused by air flowing through the syrinx.
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