Are these the official NEET questions on Animal Kingdom?

Yes. They are the questions NTA set in each paper, in its wording. The solutions are written by BrainIt.

Animal Kingdom NEET PYQs with Solutions (2020 to 2026) PDF

The questions come from NEET 2026, Re-NEET 2026 and NEET 2020. Each shows its answer and solution when you open it, so you can attempt it first. For what the chapter covers and how NEET tests it, see the Animal Kingdom guide.

Practise on the CBT screen11 questions, 11 minutes, marked +4 / −1 Download PDF5 pages, 0.8 MB, with answers and solutions

NEET 2026 · the full paper

NEET 2026 · Q147
A group of researchers procured some fish like animals and upon investigation the following characters were observed: A. Endoskeleton was made of cartilage. B. Ectoparasitic; as they were found attached on fish skin with their circular sucking mouth. C. Paired fins and scales were absent, but 7 pairs of gill slits were present.

Which of the following species of animals did they consider to fit best with these characters?
1. (1)
  Scoliodon sp.
2. (2)
  Petromyzon sp.
3. (3)
  Exocoetus sp.
4. (4)
  Branchiostoma sp.
Answer and solution
Answer: (2)
Petromyzon (lamprey) is a cyclostome with a cartilaginous endoskeleton, circular suctorial mouth, no scales or paired fins, and seven pairs of gill slits. It is ectoparasitic on fishes.

Scoliodon and Exocoetus are free-living fishes with paired fins, while Branchiostoma is a cephalochordate lacking the cyclostome-type suctorial mouth and parasitic habit.

These features identify Petromyzon.
NEET 2026 · Q153
Select the set of fishes which belong to the class Osteichthyes:
1. (1)
  Devil fish, Cuttlefish and Hagfish
2. (2)
  Saw fish, Fighting fish and Dog fish
3. (3)
  Starfish, Hagfish and Cuttlefish
4. (4)
  Flying fish, Angel fish and Fighting fish
Answer and solution
Answer: (4)
Osteichthyes are the bony fishes. Flying fish (Exocoetus), angel fish (Pterophyllum) and fighting fish (Betta) are all bony fishes. The other sets include molluscs (cuttlefish), cyclostomes (hagfish), an echinoderm (starfish) or cartilaginous fishes (saw fish, dog fish), none of which are Osteichthyes.
NEET 2026 · Q154
Select the incorrect statements from the following and choose the answer from the options given below.

Statement I: Digestive system in Platyhelminthes is incomplete.
Statement II: Bilateral symmetry is a characteristic feature of adult Echinoderms.
Statement III: Pseudocoelom is possessed by Aschelminthes.
Statement IV: Notochord is persistent throughout life in the class Chondrichthyes.
Statement V: Members of class Reptilia maintain a constant body temperature.
1. (1)
  I and III only
2. (2)
  II and V only
3. (3)
  III and IV only
4. (4)
  II and IV only
Answer and solution
Answer: (2)
Statement II is wrong because adult echinoderms show radial symmetry (only their larvae are bilaterally symmetrical), and statement V is wrong because reptiles are poikilothermic (cold-blooded) and cannot maintain a constant body temperature. Statements I, III and IV are correct, so the incorrect pair is II and V, which is option (2).
NEET 2026 · Q159
Match List I with List II and choose the correct answer from the options given below.
List I
List II
P) Molluscs
I) Pulmonary respiration only
Q) Reptiles
II) Branchial respiration
R) Adult amphibians
III) Cellular respiration
S) Amoeba
IV) Pulmonary and cutaneous respiration
1. (1)
  P-II, Q-I, R-IV, S-III
2. (2)
  P-I, Q-II, R-IV, S-III
3. (3)
  P-II, Q-I, R-III, S-IV
4. (4)
  P-III, Q-II, R-I, S-IV
Answer and solution
Answer: (1)
Molluscs respire through gills, i.e. branchial respiration (P-II), reptiles breathe only through lungs, i.e. pulmonary respiration (Q-I), adult amphibians use both lungs and moist skin, i.e. pulmonary and cutaneous respiration (R-IV), and Amoeba depends on cellular respiration by simple diffusion (S-III). This matches option (1).

List I	List II
P) Molluscs	I) Pulmonary respiration only
Q) Reptiles	II) Branchial respiration
R) Adult amphibians	III) Cellular respiration
S) Amoeba	IV) Pulmonary and cutaneous respiration

Re-NEET 2026 · the full paper

Re-NEET 2026 · Q107
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 :
1. (1)
  Both Statement I and Statement II are correct
2. (2)
  Both Statement I and Statement II are incorrect
3. (3)
  Statement I is correct but Statement II is incorrect
4. (4)
  Statement I is incorrect but Statement II is correct
Answer and solution
Answer: (3)
Radial symmetry means that any plane through the central body axis divides an organism into similar halves. Adult echinoderms are radial, but their larvae are bilateral, consistent with a bilateral ancestry. Statement I is true and statement II is false.
Re-NEET 2026 · Q130
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:
1. (1)
  Both Statement I and Statement II are correct
2. (2)
  Both Statement I and Statement II are incorrect
3. (3)
  Statement I is correct but Statement II is incorrect
4. (4)
  Statement I is incorrect but Statement II is correct
Answer and solution
Answer: (3)
The class name comes from the Latin repere or reptum, meaning to creep or crawl, so Statement I is correct. Statement II fails on a single well-known exception: CROCODILES have a four-chambered heart, while other reptiles such as lizards, snakes and turtles have three chambers. The word 'all' is what makes the statement false. NCERT Class 11, Animal Kingdom.
Re-NEET 2026 · Q132
Which of the following is not a characteristic of chordates?
1. (1)
  Presence of notochord
2. (2)
  Central nervous system is dorsal
3. (3)
  Absence of gills
4. (4)
  Presence of post anal part (tail)
Answer and solution
Answer: (3)
Chordates are defined by four fundamental features: a notochord, a dorsal hollow nerve cord, PAIRED PHARYNGEAL GILL SLITS and a post-anal tail. Gill slits are therefore present, not absent - even in terrestrial vertebrates they appear during embryonic development before being modified into other structures. NCERT Class 11, Animal Kingdom.

NEET 2020 · the full paper

NEET 2020 · Q2
Bilaterally symmetrical and acoelomate animals are exemplified by
1. (1)
  Platyhelminthes
2. (2)
  Aschelminthes
3. (3)
  Annelida
4. (4)
  Ctenophora
Answer and solution
Answer: (1)
Platyhelminthes are bilaterally symmetrical and acoelomate, lacking a body cavity. Chapter: Animal Kingdom.
NEET 2020 · Q3
Match the following columns and select the correct option.
List I
List II
P) Gregarious, polyphagous pest
I) Asterias
Q) Adult with radial symmetry and larva with bilateral symmetry
II) Scorpion
R) Book lungs
III) Ctenoplana
S) Bioluminescence
IV) Locusta
1. (1)
  P-IV, Q-I, R-II, S-III
2. (2)
  P-III, Q-II, R-I, S-IV
3. (3)
  P-II, Q-I, R-III, S-IV
4. (4)
  P-I, Q-III, R-II, S-IV
Answer and solution
Answer: (1)
Locusta is a gregarious polyphagous pest; adult Asterias has radial symmetry while its larva is bilateral; scorpions have book lungs; and Ctenoplana is bioluminescent. Thus P-IV, Q-I, R-II, S-III. Chapter: Animal Kingdom.
NEET 2020 · Q42
Which of the following statements are true for the phylum-Chordata?

Statement I: In Urochordata notochord extends from head to tail and it is present throughout their life.
Statement II: In Vertebrata notochord is present during the embryonic period only.
Statement III: Central nervous system is dorsal and hollow.
Statement IV: Chordata is divided into 3 subphyla : Hemichordata, Tunicata and Cephalochordata.
1. (1)
  (III) and (I)
2. (2)
  (I) and (II)
3. (3)
  (II) and (III)
4. (4)
  (IV) and (III)
Answer and solution
Answer: (3)
Statement I is false because urochordates retain the notochord only in the larval tail. Statement IV is false because Hemichordata is not a chordate subphylum. Statements (II) and (III) are true. Chapter: Animal Kingdom.
NEET 2020 · Q64
Match the following columns and select the correct option.
List I
List II
P) 6-15 pairs of gill slits
I) Trygon
Q) Heterocercal caudal fin
II) Cyclostomes
R) Air bladder
III) Chondrichthyes
S) Poison sting
IV) Osteichthyes
1. (1)
  P-III, Q-IV, R-I, S-II
2. (2)
  P-IV, Q-II, R-III, S-I
3. (3)
  P-I, Q-IV, R-III, S-II
4. (4)
  P-II, Q-III, R-IV, S-I
Answer and solution
Answer: (4)
Cyclostomes have 6-15 pairs of gill slits; Chondrichthyes have a heterocercal caudal fin; Osteichthyes generally have an air bladder; and Trygon bears a poison sting. Thus P-II, Q-III, R-IV, S-I. Chapter: Animal Kingdom.

List I	List II
P) Gregarious, polyphagous pest	I) Asterias
Q) Adult with radial symmetry and larva with bilateral symmetry	II) Scorpion
R) Book lungs	III) Ctenoplana
S) Bioluminescence	IV) Locusta

List I	List II
P) 6-15 pairs of gill slits	I) Trygon
Q) Heterocercal caudal fin	II) Cyclostomes
R) Air bladder	III) Chondrichthyes
S) Poison sting	IV) Osteichthyes

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Animal Kingdom: NEET previous year questions

NEET 2026 · the full paper

Re-NEET 2026 · the full paper

NEET 2020 · the full paper

Questions