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NEETZoologyStructural Organisation in Animals

Read the following statement regarding the nervous system of a frog and choose the option that correctly fills the blanks A, B, and C. The brain of a frog gives rise to exactly (A) pairs of cranial nerves, and its hindbrain consists of the (B) and (C) .

Options

  1. A(A) - 10 , (B) - cerebellum, (C) - medulla oblongata
  2. B(A) - 12 , (B) - cerebellum, (C) - medulla oblongata
  3. C(A) - 10 , (B) - optic lobes, (C) - diencephalon
  4. D(A) - 12 , (B) - olfactory lobes, (C) - cerebral hemispheres

Correct answer

A. (A) - 10 , (B) - cerebellum, (C) - medulla oblongata

Step-by-step solution

According to the NCERT description of the frog's nervous system, there are exactly 10 pairs of cranial nerves arising from the brain. The brain is divided into forebrain, midbrain, and hindbrain. The hindbrain consists of the cerebellum and the medulla oblongata. The forebrain includes the olfactory lobes, paired cerebral hemispheres, and an unpaired diencephalon, while the midbrain is characterized by a pair of optic lobes. Therefore, the option stating 12 pairs of nerves or listing forebrain/midbrain structures f

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