Structural Organisation in Animals Previous Year Questions — NEET Biology

2 past-year Structural Organisation in Animals questions from NEET (Biology).

Q164 (2024)

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:
  1. B and D only
  2. B and C only
  3. A and B only
  4. C and E only
### Related Formula $\text{Male Frog Secondary Sexual Characteristics} = \text{Vocal Sacs} + \text{Copulatory (Amplexutory) Pad on 1st Digit of Forelimbs}$ ### Core Logic Male frogs can be distinguished from female frogs by the presence of sound-producing vocal sacs and a copulatory (amplexutory) pad on the first digit of the forelimbs. Bulging eyes, webbed feet digits, and olive green skin with dark spots are common morphology in both male and female frogs. ### Step 1: Conclusion Only statements B and D are male-specific features. ### Pattern Recognition Sees: "male frogs distinguished female frogs". Shortcut: Vocal sacs and copulatory pad on 1st forelimb digit. ### Evaluation Rubric / Model Answer null ### Chapter Mix Class 11 Biology: Structural Organisation in Animals

Q166 (2024)

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:
  1. B and D only
  2. A, C and E only
  3. A, B and C only
  4. B and C only
### Related Formula $\text{Frog Anatomy: } 10 \text{ pairs cranial nerves}, \text{ Midbrain} = \text{Optic lobes}, \text{ Hepatic portal system} = \text{Liver-Intestine connection}$ ### 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. ### Evaluation Rubric / Model Answer null ### Chapter Mix Class 11 Biology: Structural Organisation in Animals
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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%)

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