NEET Structural Organisation in Animals PYQs & Practice Questions

10 free NEET Biology questions on Structural Organisation in Animals, starting with previous year questions (2016–2026). Tap “Show answer” to check each one. No login needed.

Topics: Squamous Epithelium · Adipose Tissue Classification · Identifying Connective Tissues · Setae Distribution in Earthworm · Cockroach Anatomy - Sexual Dimorphism · Epithelial Tissue Classification · Cockroach Digestive System Structures · Animal Tissues · Connective Tissue · Muscle Tissue · Neural Tissue · Earthworm Morphology

Q1NEET 2026Respiration in Amphibians (Frog)
In water, frogs respire using _________
- A. buccal cavity
- B. lungs
- C. trachea
- D. skin
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Answer: C — trachea
When submerged in water, frogs rely primarily on cutaneous respiration (gas exchange through their moist, vascularized skin), since lungs and buccal cavity respiration require access to air.
Q2NEET 2026Correct statements about frog's 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.
- A. B and D only
- B. A, B and C only
- C. B and C only
- D. A, C and E only
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Answer: C — B and C only
A (hepatic portal system between intestine and liver), C (ureters/oviducts open separately into cloaca), and E (sinus venosus joins right atrium) are correct. B is false (frogs have 10, not 12, pairs of cranial nerves); D is false (optic lobes are part of the midbrain, not hindbrain). A, C and E only.
Q3NEET 2026Distinguishing male from female frogs
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.
- A. A and B only
- B. C and E only
- C. B and D only
- D. B and C only
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Answer: B — C and E only
Male frogs have vocal sacs for croaking (B) and copulatory pads on the first digit of forelimbs for amplexus (D); these are distinguishing male features. B and D only.
Q4NEET 2025Renal Portal System in Frog
In frog, the Renal portal system is a special venous connection that acts to link:
- A. Liver and intestine
- B. Liver and kidney
- C. Kidney and intestine
- D. Kidney and lower part of body
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Answer: C — Kidney and intestine
The Renal Portal System in frogs is a special venous connection linking the kidney and the lower part of the body. The renal portal vein carries deoxygenated blood (containing excretory substances) from the lower body to the kidney. 11th NCERT, Frog. Page - 82.

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Q5NEET 2025Frog Respiration - Water vs Land
Frogs respire in water by skin and buccal cavity and on land by skin, buccal cavity and lungs. Choose the correct answer from the following:
- A. The statement is true for water but false for land
- B. The statement is true for both the environment
- C. The statement is false for water but true for land
- D. The statement is false for both the environment
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Answer: B — The statement is true for both the environment
In water, frogs respire only by skin (cutaneous respiration), not by buccal cavity - so the water part of the statement is false. On land, frogs respire by skin, buccal cavity and lungs - this part is true. Class 11th NCERT Page No. 82.
Q6NEET 2024Epithelial Tissue Classification
Match List I with List II: List I: (A) Unicellular glandular epithelium (B) Compound epithelium (C) Multicellular glandular epithelium (D) Endocrine glandular epithelium List II: (I) Salivary glands (II) Pancreas (III) Goblet cells of alimentary canal (IV) Moist surface of buccal cavity Choose the correct answer from the options given below:
- A. A-III, B-IV, C-I, D-II
- B. A-II, B-I, C-IV, D-III
- C. A-II, B-I, C-III, D-IV
- D. A-IV, B-III, C-I, D-II
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Answer: —
Unicellular glandular epithelium is exemplified by goblet cells of the alimentary canal (A-III). Compound epithelium lines the moist surface of the buccal cavity (B-IV). Multicellular glandular epithelium forms salivary glands (C-I). Endocrine glandular epithelium forms glands like the pancreas (D-II). So A-III, B-IV, C-I, D-II is correct.
Q7NEET 2024Cockroach Digestive System Structures
Match List I with List II related to digestive system of cockroach. List I: (A) The structures used for storing of food. (B) Ring of 6-8 blind tubules at junction of foregut and midgut. (C) Ring of 100-150 yellow coloured thin filaments at junction of midgut and hindgut. (D) The structures used for grinding the food. List II: (I) Gizzard (II) Gastric Caeca (III) Malpighian tubules (IV) Crop Choose the correct answer from the options given below:
- A. A-IV, B-III, C-II, D-I
- B. A-III, B-II, C-IV, D-I
- C. A-IV, B-II, C-III, D-I
- D. A-I, B-II, C-III, D-IV
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Answer: B — A-III, B-II, C-IV, D-I
The crop stores food (A-IV). Gastric caeca are a ring of 6-8 blind tubules at the junction of foregut and midgut (B-II). Malpighian tubules form a ring of 100-150 thin filaments at the junction of midgut and hindgut (C-III). The gizzard grinds food (D-I). So A-IV, B-II, C-III, D-I is correct.
Q8NEET 2023Connective Tissue - Ligaments and Cartilage
Given below are two statements: Statement I: Ligaments are dense irregular tissue. Statement II: Cartilage is dense regular tissue. In the light of the above statements, choose the correct answer from the options given below.
- A. Both Statement I and Statement II are false.
- B. Statement I is true but Statement II is false.
- C. Statement I is false but Statement II is true.
- D. Both Statement I and Statement II are true.
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Answer: A — Both Statement I and Statement II are false.
Statement I is true — ligaments are made of dense irregular connective tissue (highly elastic). Statement II is false — cartilage is not a dense regular tissue; it is a specialized connective tissue with a solid matrix (chondrin), distinct from dense regular connective tissue like tendons.

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Q9NEET 2023Epithelial and Connective Tissue Types
Match List I with List II: A. Mast cells, B. Inner surface of bronchiole, C. Blood, D. Tubular parts of nephron. List II: I. Ciliated epithelium, II. Areolar connective tissue, III. Cuboidal epithelium, IV. Specialised connective tissue. Choose the correct answer from the options given below.
- A. A-II, B-III, C-I, D-IV
- B. A-II, B-I, C-IV, D-III
- C. A-III, B-IV, C-II, D-I
- D. A-I, B-II, C-IV, D-III
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Answer: A — A-II, B-III, C-I, D-IV
Mast cells are found in areolar connective tissue (A-II). The inner surface of the bronchiole is lined by ciliated epithelium (B-I). Blood is a specialised connective tissue (C-IV). Tubular parts of the nephron are lined by cuboidal epithelium (D-III). So the correct match is A-II, B-I, C-IV, D-III.
Q10NEET 2022Connective Tissue Types
Which of the following is not a connective tissue?
- A. Blood
- B. Adipose tissue
- C. Cartilage
- D. Neuroglia
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Answer: C — Cartilage
Neuroglia are supporting cells of the nervous system (neural tissue), not connective tissue. Blood, adipose tissue, and cartilage are all types of connective tissue.

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