Q166
neet_2024_05_may_morning
Frog Internal Anatomy
Choose the correct statements regarding frog's anatomy:
A. Hepatic portal system is the special venous connection between liver and intestine.
B. There are twelve pairs of cranial nerves arising from the brain.
C. The ureters and oviducts open separately into the cloaca in female frogs.
D. Hind-brain consists of cerebellum, medulla oblongata and optic lobes.
E. Sinus venosus joins the right atrium of heart.
Choose the correct answer from the options given below:
Solution
Related Formula
Frog Anatomy: 10 pairs cranial nerves, Midbrain = Optic lobes, Hepatic portal system = Liver-Intestine connection
Core Logic
Evaluating frog anatomical statements:
- A (Correct): Hepatic portal system connects intestine and liver.
- B (Incorrect): Frogs have 10 pairs of cranial nerves, not 12.
- C (Correct): In female frogs, ureters and oviducts open separately into the cloaca.
- D (Incorrect): Optic lobes are part of the midbrain, not the hindbrain (hindbrain consists of cerebellum and medulla oblongata).
- E (Correct): Sinus venosus is a triangular structure that opens into the right atrium.
Step 1: Conclusion
Statements A, C, and E are correct.
Pattern Recognition
Sees: "frog cranial nerves 12 pairs" (False, 10 pairs) and "hindbrain contains optic lobes" (False, midbrain). Shortcut: Eliminate options with B or D.
Chapter Mix
Class 11 Biology: Structural Organisation in Animals
