NEET Animal Kingdom PYQs & Practice Questions

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

Topics: Nervous System · Metamerism · Totipotent Cells in Cnidarians · Four-Chambered Heart · Non-Glandular Skin in Reptiles · Shared Feature of Birds and Mammals · Common Taxonomic Groups · Body Cavity and Symmetry - Identifying Incorrect Statements · Oviparity in Mammals · Venomous and Non-Venomous Snakes · Phyla Classification and Examples · Body Cavity (Coelom) Classification

1. Q1NEET 2026Class Reptilia - Characteristics

   Given below are two statements: Statement I: The class name Reptilia refers to creeping or crawling mode of locomotion. Statement II: All organisms belonging to Reptilia have three chambered heart. In the light of the above statements, choose the most appropriate answer from the options given below:

   • A. Both Statement I and Statement II are incorrect
   • B. Statement I is correct but Statement II is incorrect
   • C. Statement I is incorrect but Statement II is correct
   • D. Both Statement I and Statement II are correct
   Show answer

   Answer: A — Both Statement I and Statement II are incorrect

   The name Reptilia is derived from the Latin 'repere', meaning to creep or crawl, correctly describing their mode of locomotion -- Statement I is correct. However, not all reptiles have a three-chambered heart: crocodiles (an exception among reptiles) have a four-chambered heart, so Statement II is incorrect.

2. Q2NEET 2026Characteristics of Chordates

   Which of the following is not a characteristic of chordates?

   • A. Central nervous system is dorsal
   • B. Absence of gills
   • C. Presence of post anal part (tail)
   • D. Presence of notochord
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   Answer: A — Central nervous system is dorsal

   Chordates are characterized by the presence of pharyngeal gill slits (not their absence), a dorsal hollow nerve cord, a notochord, and a post-anal tail at some stage of development. 'Absence of gills' is therefore NOT a characteristic of chordates -- the presence of gill slits is.

3. Q3NEET 2026Symmetry in Echinodermata

   Given below are two statements: Statement I: When any plane passing through the central axis of the body divides the organism into two identical halves, it is called radial symmetry. Statement II: In phylum Echinodermata, both adults and larvae are radially symmetrical. In the light of the above statements, choose the most appropriate answer from the options given below:

   • A. Both Statement I and Statement II are incorrect
   • B. Statement I is correct but Statement II is incorrect
   • C. Statement I is incorrect but Statement II is correct
   • D. Both Statement I and Statement II are correct
   Show answer

   Answer: A — Both Statement I and Statement II are incorrect

   Radial symmetry is correctly defined as any plane passing through the central axis dividing the organism into two identical halves -- Statement I is correct. However, in Echinodermata, only the ADULTS are radially symmetrical; the larvae are bilaterally symmetrical, which is a classic exception used to indicate their evolutionary origin from bilaterally symmetrical ancestors -- Statement II is incorrect.

4. Q4NEET 2026Respiration in Sponges

   Sponges exchange O2 with CO2 by ____________

   • A. moist cuticle
   • B. tracheal tubes
   • C. gills
   • D. simple diffusion over their entire body surfaces
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   Answer: C — gills

   Sponges lack specialized respiratory organs; gas exchange (O2 and CO2) occurs by simple diffusion over their entire body surface.

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5. Q5NEET 2026Flightless bird with paddle-like forelimbs

   The flightless bird with forelimbs modified as paddle-like structures suited for swimming is known as:

   • A. Psittacula
   • B. Aptenodytes
   • C. Nephron
   • D. Struthio
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   Answer: A — Psittacula

   Aptenodytes (penguin genus) has flightless, paddle-like flippers suited for swimming.

6. Q6NEET 2026Incorrect statements about invertebrate phyla

   Select the incorrect statements from the following: A. Digestive system in Platyhelminthes is incomplete. B. Bilateral symmetry is a characteristic feature of adult Echinoderms. C. Pseudocoelom is possessed by Aschelminthes. D. Notochord is persistent throughout life in the class Chondrichthyes. E. Members of class Reptilia maintain a constant body temperature.

   • A. A and C only
   • B. B and D only
   • C. B and D only
   • D. C and D only
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   Answer: A — A and C only

   B is incorrect (adult echinoderms show radial, not bilateral, symmetry — only larvae are bilateral); E is incorrect (reptiles are ectothermic, not constant body temperature). A, C, D are correct statements. B and E only incorrect; per key matches option B and D only.

7. Q7NEET 2026Fishes belonging to class Osteichthyes

   Select the set of fishes which belong to the class Osteichthyes:

   • A. Saw fish, Fighting fish and Dog fish
   • B. Devil fish, Cuttlefish and Hagfish
   • C. Starfish, Hagfish and Cuttlefish
   • D. Flying fish, Angel fish and Fighting fish
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   Answer: C — Starfish, Hagfish and Cuttlefish

   Flying fish, Angel fish, and Fighting fish are all bony fishes belonging to class Osteichthyes (saw fish, dog fish, hagfish are cartilaginous/jawless, not bony).

8. Q8NEET 2025Coelom Types - Classification

   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?

   • A. Acoelomate
   • B. Pseudocoelomate
   • C. Schizocoelomate
   • D. Spongocoelomate
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   Answer: A — Acoelomate

   In a pseudocoelomate, the body cavity is not lined by mesoderm on both sides — mesoderm is present as scattered pouches, typically only towards the body wall and not towards the alimentary canal.

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9. Q9NEET 2025Water Vascular System - Function in Echinoderms

   Role of the water vascular system in Echinoderms is: A. Respiration and Locomotion B. Excretion and Locomotion C. Capture and transport of food D. Digestion and Respiration E. Digestion and Excretion Choose the correct answer from the options given below:

   • A. A and B Only
   • B. A and C Only
   • C. B and C Only
   • D. B, D and E Only
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   Answer: A — A and B Only

   The water vascular system, a characteristic feature of Echinoderms, helps in locomotion, capture and transport of food, and respiration. So A (Respiration and Locomotion) and C (Capture and transport of food) are correct. Class 11th NCERT Page No.45.

10. Q10NEET 2024Phyla Classification and Examples

    Match List-I with List-II. List-I: (A) Pleurobrachia (B) Radula (C) Stomochord (D) Air bladder List-II: (I) Mollusca (II) Ctenophora (III) Osteichthyes (IV) Hemichordata Choose the correct answer from the options given below:

    • A. A-II, B-IV, C-I, D-III
    • B. A-IV, B-III, C-II, D-I
    • C. A-IV, B-II, C-III, D-I
    • D. A-II, B-I, C-IV, D-III
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    Answer: C — A-IV, B-II, C-III, D-I

    Pleurobrachia belongs to phylum Ctenophora (A-II). Radula is a feeding structure found in Mollusca (B-I). Stomochord is found in Hemichordata (C-IV). Air bladder is found in Osteichthyes/bony fish (D-III). So A-II, B-I, C-IV, D-III is correct.