NEET · Biology —

Structural Organisation in Animals appeared 2 times across 1 year — 2.2% of Biology. This question is from Anatomy of Frog.

Year 2024 Total
Questions 2 2
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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 & Explanation

Core Logic

A. Correct - In frogs, the special venous connection between the liver and intestine is called the hepatic portal system. B. Incorrect - There are ten pairs of cranial nerves arising from the brain of a frog (unlike humans who have 12 pairs). C. Correct - In female frogs, the ureters and oviduct open separately into the cloaca. D. Incorrect - The midbrain consists of the optic lobes. The hindbrain consists of the cerebellum and medulla oblongata only. E. Correct - In frogs, a triangular structure called the sinus venosus joins the right atrium.

Step 1: Final Conclusion

Thus, the correct statements are (A), (C) and (E).

Pattern Recognition

Frogs = 10 cranial nerves (amphibian trait). Optic lobes = midbrain. Sinus venosus is present and connected to the right atrium.

Chapter Mix

Class 11 Biology: Structural Organisation in Animals

Reference Study Guides

Structural Organisation In Animals

More Structural Organisation in Animals Previous-Year Questions

Q164 neet_2026_03_may_morning Morphology of Frog
Male frogs can be distinguished from female frogs due to the presence of A. Bulging eyes B. Vocal sacs C. Webbed digits in feet D. Copulatory pad on first digit of fore limbs E. Olive green-coloured skin with dark irregular spots Choose the correct answer from the options given below
  • A. B and D only
  • B. B and C only
  • C. A and B only
  • D. C and E only

Solution

Core Logic

Male frogs exhibit sexual dimorphism by having vocal sacs and a copulatory (nuptial) pad on the first digit of the fore limbs. Bulging eyes, webbed digits in feet, and olive green-coloured skin with dark irregular spots are morphological features common to both male and female frogs.

Step 1: Final Conclusion

Thus, the distinct characteristics for male frogs are B and D only.

Pattern Recognition

Vocal sacs (for mating calls) and copulatory pads (for amplexus) are exclusive male reproductive adaptations.

Chapter Mix

Class 11 Biology: Structural Organisation in Animals

More Structural Organisation in Animals Questions — neet_2026_03_may_morning

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JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%) | JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%)