Question

Incorrect information about frog (Rana tigrina):

• A. $10$ pairs of cranial nerves and $10$ pairs of spinal nerves
• B. $4000$ urini ferous tubules in body
• C. $2$ lymph hearts in body
• D. Breeding season is form july to september

Answer 1

Answer: (A)

$10$ pairs of cranial nerves and $10$ pairs of spinal nerves

An adult frog normally has 10 pairs of cranial nerves and 10 pairs of spinal nerves. But in Rana tigrina the 10th spinal nerve pair is reduced or absent. So there are only 9 pairs of spinal nerves in Rana tigrina.