MCQs on Animal Kingdom – Class 11 Biology NCERT Based
Below is a well-structured, NCERT-strict set of 40 MCQs with answers and clear, concept-based explanations for:
Course: CBSE Class 11 Biology – MCQs with Answers and Explanations
Unit I: Diversity in Living World
Topic: Animal Kingdom – Class 11 Biology (NCERT Based)
The questions are section-wise, exam-oriented, and fully aligned with the NCERT syllabus, making them ideal for CBSE Board exam preparation.
MCQs on Animal Kingdom – Class 11 Biology (NCERT)
Section A: Basis of Animal Classification
Q1. Animals are classified mainly on the basis of:
A. Habitat only
B. Body organisation and symmetry
C. Mode of nutrition only
D. Size and colour
Answer: B
Explanation:
NCERT classifies animals based on level of organisation, symmetry, germ layers, coelom, segmentation, and notochord.
Q2. Which level of organisation is seen in sponges?
A. Tissue level
B. Organ level
C. Organ system level
D. Cellular level
Answer: D
Explanation:
Sponges (Porifera) show cellular level of organisation where cells are loosely arranged.
Q3. Animals with radial symmetry include:
A. Arthropoda
B. Mollusca
C. Cnidaria
D. Chordata
Answer: C
Explanation:
Cnidarians show radial symmetry as body parts are arranged around a central axis.
Q4. Bilateral symmetry is characteristic of:
A. Cnidaria
B. Echinodermata (adult)
C. Annelida
D. Porifera
Answer: C
Explanation:
Annelids show bilateral symmetry with distinct right and left sides.
Section B: Germ Layers and Body Cavity
Q5. Animals having two germ layers are called:
A. Triploblastic
B. Diploblastic
C. Pseudocoelomate
D. Coelomate
Answer: B
Explanation:
Diploblastic animals have ectoderm and endoderm only, e.g., cnidarians.
Q6. Mesoderm is absent in:
A. Annelida
B. Mollusca
C. Cnidaria
D. Arthropoda
Answer: C
Explanation:
Cnidarians are diploblastic and lack mesoderm.
Q7. True coelom is found in:
A. Platyhelminthes
B. Aschelminthes
C. Annelida
D. Cnidaria
Answer: C
Explanation:
Annelids possess a true coelom lined by mesoderm.
Q8. Pseudocoelom is characteristic of:
A. Annelida
B. Mollusca
C. Aschelminthes
D. Echinodermata
Answer: C
Explanation:
Aschelminthes have a pseudocoelom not fully lined by mesoderm.
Section C: Phylum Porifera and Cnidaria
Q9. Porifera are commonly called:
A. Sponges
B. Corals
C. Jellyfish
D. Starfish
Answer: A
Explanation:
Members of Porifera are commonly known as sponges.
Q10. Water canal system is a characteristic feature of:
A. Cnidaria
B. Porifera
C. Mollusca
D. Annelida
Answer: B
Explanation:
Poriferans possess a water canal system for nutrition and respiration.
Q11. Cnidarians possess specialised cells called:
A. Choanocytes
B. Nematocysts
C. Flame cells
D. Nephridia
Answer: B
Explanation:
Cnidarians have nematocysts for defence and capturing prey.
Q12. Which cnidarian exists as both polyp and medusa?
A. Hydra
B. Aurelia
C. Obelia
D. Adamsia
Answer: C
Explanation:
Obelia shows alternation between polyp and medusa forms.
Section D: Platyhelminthes and Aschelminthes
Q13. Flatworms belong to phylum:
A. Annelida
B. Aschelminthes
C. Platyhelminthes
D. Mollusca
Answer: C
Explanation:
Platyhelminthes are dorsoventrally flattened worms.
Q14. Flame cells are excretory structures in:
A. Annelida
B. Platyhelminthes
C. Arthropoda
D. Mollusca
Answer: B
Explanation:
Flame cells help in osmoregulation and excretion in flatworms.
Q15. Which phylum includes roundworms?
A. Annelida
B. Platyhelminthes
C. Aschelminthes
D. Mollusca
Answer: C
Explanation:
Aschelminthes are round, unsegmented worms.
Q16. Example of parasitic roundworm is:
A. Planaria
B. Taenia
C. Ascaris
D. Earthworm
Answer: C
Explanation:
Ascaris is a parasitic roundworm found in the human intestine.
Section E: Annelida and Arthropoda
Q17. Metameric segmentation is a feature of:
A. Mollusca
B. Arthropoda
C. Annelida
D. Echinodermata
Answer: C
Explanation:
Annelids have body divided into repeated segments.
Q18. Which annelid is commonly used for vermicomposting?
A. Leech
B. Nereis
C. Earthworm
D. Hirudinaria
Answer: C
Explanation:
Earthworms help in soil fertility and vermicomposting.
Q19. Arthropods possess:
A. Soft body
B. Jointed appendages
C. Unsegmented body
D. Cilia
Answer: B
Explanation:
Jointed appendages are a defining feature of Arthropoda.
Q20. Largest phylum of animal kingdom is:
A. Mollusca
B. Annelida
C. Arthropoda
D. Chordata
Answer: C
Explanation:
Arthropoda includes insects, crustaceans, arachnids, etc., and is the largest phylum.
Section F: Mollusca and Echinodermata
Q21. Molluscs generally possess:
A. Segmented body
B. Exoskeleton of chitin
C. Soft body with shell
D. Radial symmetry
Answer: C
Explanation:
Molluscs have soft bodies usually protected by calcareous shells.
Q22. Respiratory organ of molluscs is:
A. Gills
B. Trachea
C. Book lungs
D. Skin
Answer: A
Explanation:
Most molluscs respire using gills.
Q23. Adult echinoderms show:
A. Bilateral symmetry
B. Radial symmetry
C. Asymmetry
D. Segmentation
Answer: B
Explanation:
Adult echinoderms are radially symmetrical.
Q24. Water vascular system is found in:
A. Mollusca
B. Arthropoda
C. Echinodermata
D. Annelida
Answer: C
Explanation:
Echinoderms possess a water vascular system for locomotion.
Section G: Protochordates and Chordata
Q25. Presence of notochord is a feature of:
A. Arthropoda
B. Mollusca
C. Chordata
D. Echinodermata
Answer: C
Explanation:
Chordates are characterised by the presence of notochord at some stage.
Q26. Which chordate feature is present throughout life?
A. Notochord
B. Pharyngeal slits
C. Dorsal hollow nerve cord
D. Tail
Answer: C
Explanation:
Dorsal hollow nerve cord persists throughout life in chordates.
Q27. Urochordates show notochord in:
A. Adult stage
B. Both stages
C. Larval stage only
D. Absent
Answer: C
Explanation:
Urochordates have notochord only in the larval stage.
Q28. Vertebrates differ from protochordates because they have:
A. Notochord
B. Vertebral column
C. Gill slits
D. Post-anal tail
Answer: B
Explanation:
Vertebrates possess a vertebral column replacing the notochord.
Section H: Final Revision MCQs
Q29. Animals without body cavity are:
A. Coelomates
B. Pseudocoelomates
C. Acoelomates
D. Deuterostomes
Answer: C
Q30. Metameric segmentation is absent in:
A. Annelida
B. Arthropoda
C. Chordata
D. Mollusca
Answer: D
Q31. Flame cells function in:
A. Respiration
B. Reproduction
C. Excretion
D. Digestion
Answer: C
Q32. Open circulatory system is seen in:
A. Annelida
B. Arthropoda
C. Chordata
D. Platyhelminthes
Answer: B
Q33. Closed circulatory system is present in:
A. Arthropoda
B. Mollusca
C. Annelida
D. Cnidaria
Answer: C
Q34. Which phylum includes organisms with mantle?
A. Arthropoda
B. Mollusca
C. Annelida
D. Echinodermata
Answer: B
Q35. Nematocysts are present in:
A. Porifera
B. Platyhelminthes
C. Cnidaria
D. Annelida
Answer: C
Q36. Body cavity lined by mesoderm is called:
A. Pseudocoelom
B. Haemocoel
C. Coelom
D. Gastrovascular cavity
Answer: C
Q37. Example of echinoderm is:
A. Pila
B. Asterias
C. Hirudinaria
D. Prawn
Answer: B
Q38. Largest phylum in animal kingdom is:
A. Mollusca
B. Annelida
C. Arthropoda
D. Chordata
Answer: C
Q39. Which group shows metameric segmentation and true coelom?
A. Platyhelminthes
B. Aschelminthes
C. Annelida
D. Mollusca
Answer: C
Q40. Animals with dorsal hollow nerve cord belong to:
A. Non-chordates
B. Protozoa
C. Chordates
D. Arthropoda
Answer: C