Chapter 4: Animal Kingdom – MCQs with Answers & Explanations
CBSE Class 11 Biology MCQs – Animal Kingdom (Chapter 4) | NCERT-Based Practice with Answers & Explanations
Course Overview
Course: CBSE Class 11 Biology
Unit: Unit I – Diversity in Living World
Chapter: Chapter 4 – Animal Kingdom
Board: CBSE Board Examinations (As per latest NCERT syllabus)
Framework Coverage
- Basis of animal classification
- Non-Chordates
- Chordates
- Major animal phyla and their characteristics
Assessment Focus:
Examples • Classification keys • Concept-based MCQs • Diagram-oriented concepts
Section I: Basis of Classification (MCQs 1–12)
Q1. The basis of classification of animals according to NCERT includes all except:
A. Level of organisation
B. Symmetry
C. Mode of nutrition
D. Presence or absence of coelom
Correct Answer: C
Explanation: NCERT classifies animals based on structural and developmental features, not feeding habits.
Q2. Animals with tissues but no organs belong to which level of organisation?
A. Cellular
B. Tissue
C. Organ
D. Organ-system
Correct Answer: B
Explanation: Tissue level organisation is seen in Cnidaria.
Q3. Radial symmetry is typically seen in:
A. Platyhelminthes
B. Annelida
C. Cnidaria
D. Arthropoda
Correct Answer: C
Explanation: Radial symmetry allows equal response to stimuli from all directions.
Q4. Bilaterally symmetrical animals usually show:
A. Radial cleavage
B. Indeterminate cleavage
C. Cephalisation
D. Diploblastic organisation
Correct Answer: C
Explanation: Bilateral symmetry leads to head formation (cephalisation).
Q5. Triploblastic animals possess:
A. Two germ layers
B. Three germ layers
C. No germ layers
D. Endoderm only
Correct Answer: B
Explanation: Triploblastic animals have ectoderm, mesoderm, and endoderm.
Q6. True coelom is absent in:
A. Annelida
B. Arthropoda
C. Mollusca
D. Platyhelminthes
Correct Answer: D
Explanation: Platyhelminthes are acoelomates.
Q7. Pseudocoelom is derived from:
A. Mesoderm
B. Ectoderm
C. Endoderm
D. Blastocoel
Correct Answer: D
Explanation: Pseudocoelom is the persistent blastocoel.
Q8. Segmentation of the body is called:
A. Cephalisation
B. Metamerism
C. Tagmatization
D. Polymorphism
Correct Answer: B
Explanation: Metamerism occurs in annelids and arthropods.
Q9. Open circulatory system is found in:
A. Annelida
B. Arthropoda
C. Chordata
D. Echinodermata
Correct Answer: B
Explanation: Arthropods have haemolymph flowing in sinuses.
Q10. Closed circulatory system is characteristic of:
A. Arthropoda
B. Mollusca
C. Annelida
D. Cnidaria
Correct Answer: C
Explanation: Annelids have blood confined to vessels.
Q11. Animals with a notochord at any stage of life belong to:
A. Non-chordata
B. Vertebrata
C. Chordata
D. Protochordata only
Correct Answer: C
Explanation: Presence of notochord defines chordates.
Q12. Which is a diagnostic feature of chordates?
A. Radial symmetry
B. Ventral nerve cord
C. Dorsal hollow nerve cord
D. Open circulatory system
Correct Answer: C
Explanation: Chordates possess a dorsal hollow nerve cord.
Section II: Non-Chordates (MCQs 13–32)
Q13. Porifera are characterised by:
A. Tissue-level organisation
B. Cellular-level organisation
C. Organ-level organisation
D. Organ-system organisation
Correct Answer: B
Explanation: Sponges show cellular level organisation.
Q14. Canal system is a feature of:
A. Cnidaria
B. Porifera
C. Annelida
D. Mollusca
Correct Answer: B
Explanation: Canal system helps in water circulation in sponges.
Q15. Choanocytes are found in:
A. Hydra
B. Jellyfish
C. Sponges
D. Starfish
Correct Answer: C
Explanation: Choanocytes help in feeding and water movement.
Q16. Cnidoblasts are characteristic of:
A. Porifera
B. Platyhelminthes
C. Cnidaria
D. Echinodermata
Correct Answer: C
Explanation: Cnidoblasts contain stinging nematocysts.
Q17. Which is diploblastic?
A. Annelida
B. Arthropoda
C. Mollusca
D. Cnidaria
Correct Answer: D
Q18. Acoelomate animals belong to:
A. Nematoda
B. Platyhelminthes
C. Annelida
D. Arthropoda
Correct Answer: B
Q19. Flame cells are excretory structures in:
A. Nematoda
B. Platyhelminthes
C. Annelida
D. Mollusca
Correct Answer: B
Q20. Roundworms belong to phylum:
A. Annelida
B. Arthropoda
C. Nematoda
D. Mollusca
Correct Answer: C
Q21. Body cavity of nematodes is:
A. True coelom
B. Acoelom
C. Pseudocoelom
D. Haemocoel
Correct Answer: C
Q22. Metameric segmentation is seen in:
A. Platyhelminthes
B. Nematoda
C. Annelida
D. Mollusca
Correct Answer: C
Q23. Earthworm belongs to:
A. Mollusca
B. Annelida
C. Arthropoda
D. Echinodermata
Correct Answer: B
Q24. Arthropods have:
A. Unjointed appendages
B. Jointed appendages
C. Parapodia
D. Tube feet
Correct Answer: B
Q25. Exoskeleton of arthropods is made of:
A. Calcium carbonate
B. Chitin
C. Cellulose
D. Keratin
Correct Answer: B
Q26. Molluscs have:
A. Radial symmetry
B. Segmented body
C. Soft body with shell
D. Jointed appendages
Correct Answer: C
Q27. Foot, mantle, and visceral hump are seen in:
A. Arthropoda
B. Mollusca
C. Annelida
D. Echinodermata
Correct Answer: B
Q28. Water vascular system is a feature of:
A. Mollusca
B. Arthropoda
C. Echinodermata
D. Annelida
Correct Answer: C
Q29. Adult echinoderms show:
A. Bilateral symmetry
B. Radial symmetry
C. Asymmetry
D. No symmetry
Correct Answer: B
Q30. Tube feet are used for:
A. Respiration only
B. Circulation
C. Locomotion
D. Excretion
Correct Answer: C
Q31. Which phylum is exclusively marine?
A. Mollusca
B. Arthropoda
C. Echinodermata
D. Annelida
Correct Answer: C
Q32. Larvae of echinoderms are:
A. Radially symmetrical
B. Asymmetrical
C. Bilaterally symmetrical
D. Absent
Correct Answer: C
Section III: Chordates (MCQs 33–50)
Q33. Notochord is replaced by vertebral column in:
A. Protochordata
B. Urochordata
C. Vertebrata
D. Cephalochordata
Correct Answer: C
Q34. Pharyngeal gill slits are present in:
A. Only fishes
B. Only amphibians
C. All chordates
D. Only mammals
Correct Answer: C
Q35. Post-anal tail is found in:
A. Non-chordates
B. Arthropods
C. Chordates
D. Molluscs
Correct Answer: C
Q36. Which is a poikilothermic animal?
A. Bird
B. Mammal
C. Fish
D. Human
Correct Answer: C
Q37. Heart of fishes is:
A. Two-chambered
B. Three-chambered
C. Four-chambered
D. Single-chambered
Correct Answer: A
Q38. Amphibians can live:
A. Only on land
B. Only in water
C. Both on land and water
D. Only in trees
Correct Answer: C
Q39. Reptiles have:
A. Moist skin
B. Scales
C. Gills
D. Fins
Correct Answer: B
Q40. Birds are characterised by:
A. Teeth
B. Gills
C. Feathers
D. Scales only
Correct Answer: C
Q41. Mammals have:
A. Scales
B. Feathers
C. Hair and mammary glands
D. Gills
Correct Answer: C
Q42. Crocodile has:
A. Three-chambered heart
B. Two-chambered heart
C. Four-chambered heart
D. No heart
Correct Answer: C
Q43. Warm-blooded animals include:
A. Fishes and reptiles
B. Amphibians only
C. Birds and mammals
D. Reptiles only
Correct Answer: C
Q44. Presence of amnion is seen in:
A. Amphibia
B. Pisces
C. Reptilia
D. Cyclostomata
Correct Answer: C
Q45. Which animal lays eggs and produces milk?
A. Bat
B. Kangaroo
C. Platypus
D. Whale
Correct Answer: C
Q46. Vertebrates with gills throughout life:
A. Amphibians
B. Reptiles
C. Fishes
D. Birds
Correct Answer: C
Q47. Frog belongs to class:
A. Reptilia
B. Amphibia
C. Pisces
D. Mammalia
Correct Answer: B
Q48. Whale is a:
A. Fish
B. Reptile
C. Mammal
D. Amphibian
Correct Answer: C
Q49. Which class has pneumatic bones?
A. Mammalia
B. Amphibia
C. Reptilia
D. Aves
Correct Answer: D
Q50. Which is the most advanced vertebrate group?
A. Pisces
B. Amphibia
C. Reptilia
D. Mammalia
Correct Answer: D
Explanation: Mammals show maximum complexity and specialisation.
🔍 Exam Tip
These MCQs are highly aligned with NCERT language, examples, and classification logic—ideal for school exams, Olympiads, and CBSE-based competitive preparation.