NEET Biology · Animal Kingdom PYQ

NEET Animal Kingdom PYQ (2020–2025)

Animal Kingdom is a P1 NEET Biology chapter — ~4% weightage on trend, often 1–2 questions per paper. Part of Class 11 Diversity block with high NCERT-line recall. Phylum characteristics, symmetry, coelom types and notochord are recurring question templates.

Animal Kingdom PYQs spanning NEET 2020 to NEET 2025, tagged by phylum and sub-topic. Every solution cites NCERT Class 11 Chapter 4 references.

Practise Animal Kingdom PYQs All Biology PYQs

Animal Kingdom at a Glance

Weightage

~4%

approx · 10-yr avg

Priority

Must master

Year range

2020–2025

PYQ coverage

Typical in paper

1–2

per session

Try 5 Real Animal Kingdom PYQs

5 real NEET questions on Animal Kingdom, straight from past papers. Try them, then check the answer.

Q1NEET 2025
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 :
1. $B and C Only$
2. $B, D and E Only$
3. $A and B Only$
4. $A and C Only$
Step-by-step solution — free with sign-up
Q2NEET 2024
The following are the statements about non-chordates:

A. Pharynx is perforated by gill slits.

B. Notochord is absent.

C. Central nervous system is dorsal.

D. Heart is dorsal if present.

E. Post anal tail is absent.

Choose the most appropriate answer from the options given below:
1. $A & C only$
2. $A, B & D only$
3. $B, D & E only$
4. $B, C & D only$
Step-by-step solution — free with sign-up
Q3NEET 2023
The unique mammalian characteristics are :
1. $hairs, pinna and mammary glands$
2. $hairs, pinna and indirect development$
3. $pinna, monocondylic skull and mammary glands$
4. $hairs, tympanic membrane and mammary glands$
Step-by-step solution — free with sign-up
Q4NEET 2022 Phase 2
Which of the following animals has three chambered heart?
1. $Pteropus$
2. $Scoliodon$
3. $Hippocampus$
4. $Chelone$
Step-by-step solution — free with sign-up
Q5NEET 2021
Which one of the following organisms bears hollow and pneumatic long bones?
1. $Ornithorhynchus$
2. $Neophron$
3. $Hemidactylus$
4. $Macropus$
Step-by-step solution — free with sign-up

Practise the full Animal Kingdom set

Every past-paper question of this chapter, with solutions, timing and your accuracy tracked.

Practise the full set free

Key Sub-Topics & What's Tested

Basis of Classification

Levels of organisation (cellular, tissue, organ, organ-system), symmetry (radial, bilateral, asymmetrical), diploblastic vs triploblastic, coelom types.

Phylum Porifera (Sponges)

Cellular level, canal system, spongocoel, choanocytes, spicules. Examples: Sycon, Spongilla, Euspongia (bath sponge).

Phylum Cnidaria (Coelenterates)

Radial symmetry, diploblastic, tissue level, cnidoblasts (stinging cells). Examples: Hydra, Jellyfish (Aurelia), Physalia (man-of-war).

Phylum Platyhelminthes (Flatworms)

Bilateral symmetry, triploblastic, acoelomate, flame cells for excretion. Examples: Planaria, Liver fluke (Fasciola), Tapeworm (Taenia).

Phylum Aschelminthes (Roundworms)

Bilateral, triploblastic, pseudocoelomate, sexual dimorphism. Examples: Ascaris, Wuchereria (filarial worm), Ancylostoma (hookworm).

Phylum Annelida (Segmented Worms)

Metameric segmentation, coelomate, closed circulation, nephridia. Examples: Earthworm (Pheretima), Nereis, Hirudinaria (leech).

Phylum Arthropoda

Largest phylum (80% of all species), exoskeleton of chitin, jointed appendages, open circulation. Examples: Insects, spiders, crabs, centipedes.

Phylum Mollusca

Soft-bodied, muscular foot, mantle, radula (except bivalves), usually shell. Examples: Pila (apple snail), Octopus, Oyster, Chiton.

Phylum Echinodermata

Pentaradial symmetry (adults), water vascular system, tube feet, endoskeleton of calcareous plates. Examples: Starfish (Asterias), Sea urchin, Sea cucumber.

Phylum Chordata

Notochord, dorsal hollow nerve cord, pharyngeal gill slits, post-anal tail. Sub-phyla: Urochordata (tunicates), Cephalochordata (lancelets), Vertebrata.

Question Type Distribution

Question Type	Share (approx)	Example Pattern
Phylum-Characteristic Matching	25%	Match each feature: nematoblasts, radula, water vascular system, flame cells to its phylum.
Example Identification	25%	Which of the following belongs to Phylum Platyhelminthes? (Taenia, Ascaris, Nereis, Hydra — answer: Taenia)
Symmetry / Coelom Classification	15%	Identify organisms that are diploblastic AND triploblastic acoelomate.
Respiratory / Circulatory System	15%	Which phylum shows open circulatory system? (Arthropoda, Mollusca)
Scientific Names Recall	10%	Scientific name of cockroach — Periplaneta americana.
Unique Structure Association	10%	Cnidoblast is associated with which phylum? (Cnidaria)

How to Solve Animal Kingdom PYQs

1
Build a phylum-feature table. For each of 10 phyla: key features, examples, symmetry, coelom type. NCERT Class 11 Ch 4 has this; make your own compact version.
2
Memorise 5-10 examples per phylum. NCERT lists specific examples — memorise them. NTA often asks "which belongs to phylum X?" with the exact examples from NCERT.
3
Symmetry types: radial vs bilateral. Cnidaria + Echinodermata (adults) = radial. Most others = bilateral. Porifera = asymmetrical (or radial).
4
Coelom types: 3 categories. Acoelomate (no cavity: Platyhelminthes), Pseudocoelomate (false cavity: Aschelminthes), Coelomate (true cavity: Annelida onwards).
5
For Chordata, know 4 defining features. Notochord + dorsal hollow nerve cord + pharyngeal gill slits + post-anal tail. All 4 must be present (at some stage) for chordate.

Common Mistakes That Cost Marks

Calling earthworm an insect. Earthworm is Annelida (segmented worm). Insects are Arthropoda (jointed appendages, exoskeleton). Completely different phyla.
Wrong scientific name. NCERT is strict on binomial names. Pheretima (earthworm), Periplaneta (cockroach), Taenia (tapeworm) — memorise genus names exactly.
Treating Porifera as tissue level. Porifera is CELLULAR level (no tissues). Cnidaria is tissue level (diploblastic). Different organisation levels.
Confusing open and closed circulation. Arthropoda + Mollusca = open (blood in haemocoel). Annelida + Chordata = closed (blood in vessels). Don't swap.
Missing notochord in chordates. Notochord is defining feature of Chordata. In Vertebrata, it's replaced by vertebral column in adults. Embryonic notochord is still required.

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Frequently asked questions

How many Animal Kingdom PYQs should I solve?

Target 70–90 PYQs across NEET 2020 to NEET 2025. High NCERT-recall density rewards consistent practice.

Is NCERT Class 11 Chapter 4 enough?

Yes — NCERT Ch 4 (Animal Kingdom) is comprehensive. Read 3+ times. Create flashcards for phylum-feature pairs and phylum-example mappings.

What's the most-tested pattern in Animal Kingdom?

"Which organism belongs to phylum X?" with examples. Appears in nearly every NEET paper. Master the examples per phylum.

Do I need to memorise scientific names?

Yes — at least 3-5 per phylum. NCERT highlights specific examples; these appear in PYQs verbatim as options.

Is symmetry heavily tested?

Moderately — 1 PYQ per paper on symmetry or coelom classification. Know the 3 coelom types and 3 symmetry types.

Does Animal Kingdom connect with Human Physiology?

Yes — Chordata includes Vertebrata which includes Mammalia which includes humans. Understanding phylum features sets foundation for human anatomy.

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