Structural Organisation in Animals NEET PYQs (1989–2026)

Solved Structural Organisation in Animals PYQs

3 recent questions with answers. The full set of 103 is free to practise.

1. NEET 2026MediumMorphology and anatomy of frog
   Q1

   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:

   • AB and C only
   • BC and E only
   • CA and B only
   • DB and D only

   Show answer & solution

   Correct answer: (D)

   Male frogs have vocal sacs and copulatory pads. So B and D.
2. NEET 2025HardKey structural features in animals
   Q2

   While trying to find out the characteristic of a newly found animal, a researcher did the histology of adult animal and observed a cavity with presence of mesodermal tissue towards the body wall but no mesodermal tissue was observed towards the alimentary canal. What could be the possible coelome of that animal?

   • ASchizocoelomate
   • BSpongocoelomate
   • CAcoelomate
   • DPseudocoelomate

   Show answer & solution

   Correct answer: (D)

   In pseudocoelomates, the body cavity features mesodermal tissue along the body wall, but it is not fully lined with mesoderm, as there is no mesodermal tissue present towards the alimentary canal. Schizocoelomates: These animals have a body cavity, or coelom, which develops from a split within the mesoderm, the middle germ layer during embryonic development.
   
   Acoelomates: Animals in this category lack a coelom entirely; they do not have a body cavity between their gut and body wall.
   
   Spongocoel: This term refers to the central cavity characteristic of sponges, which are sessile aquatic animals.
3. NEET 2024MediumAnimal tissues
   Q3

   In which of the following connective tissues, the cells secrete fibres of collagen or elastin?
   
   A. Cartilage
   
   B. Bone
   
   C. Adipose tissue
   
   D. Blood
   
   E. Areolar tissue
   
   Choose the most appropriate answer from the options given below : [NEET 2024 Re]

   • AB, C, D and E only
   • BA, B, C and E only
   • CB, C and D only
   • DA, C and D only

   Show answer & solution

   Correct answer: (B)

   The correct answer is option (2) as blood does not contain fibre secreting cells called as fibroblasts. Whereas, cartilage, bone, adipose tissue and areolar tissue contain cells that secrete fibres of collagen or elastin or structural protein.
   
   The other options (1), (3) and (4) are incorrect as they mention blood which lacks fibroblasts.

Topic-wise question count

Where NEET has asked from Structural Organisation in Animals, most frequent first.

• Animal tissues54
• Morphology and anatomy of cockroach20
• Morphology and anatomy of frog12
• Morphology and anatomy of earthworm11
• Key structural features in animals6

Year-wise Structural Organisation in Animals questions in NEET

Number of questions from this chapter in each year's paper(s).