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Class 11 Biology MCQ Chapter 4 Animal Kingdom
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Animal Kingdom
Chapter – 4
| UNIT – (I) DIVERSITY IN THE LIVING WORLD |
| MCQ |
1. Which of the following phyla is characterised by the presence of a notochord during some stage of its life cycle?
(a) Porifera.
(b) Annelida.
(c) Chordata.
(d) Platyhelminthes.
Ans: (c) Chordata.
2. Insects belong to the phylum.
(a) Mollusca.
(b) Arthropoda.
(c) Echinodermata.
(d) Nematoda.
Ans: (b) Arthropoda.
3. The exoskeleton of arthropods is primarily composed of:
(a) Calcium carbonate.
(b) Chitin.
(c) Silica.
(d) Keratin.
Ans: (b) Chitin.
4. Which of the following is a characteristic feature of animals belonging to the phylum Chordata?
(a) Presence of a true coelom.
(b) Segmented body.
(c) Bilateral symmetry.
(d) Notochord.
Ans: (d) Notochord.
5. Animals that can regulate their body temperature internally are known as:
(a) Poikilotherms.
(b) Homeotherms.
(c) Ectotherms.
(d) Mesotherms.
Ans: (b) Homeotherms.
6. The water vascular system is a characteristic feature of animals belonging to the phylum:
(a) Porifera.
(b) Cnidaria.
(c) Echinodermata.
(d) Platyhelminthes.
Ans: (c) Echinodermata.
7. Which of the following is a unique feature of echinoderms?
(a) Radial symmetry.
(b) Segmented body.
(c) Water vascular system.
(d) Exoskeleton.
Ans: (c) Water vascular system.
8. Birds and mammals belong to the subphylum:
(a) Urochordata.
(b) Cephalochordata.
(c) Vertebrata.
(d) Hemichordata.
Ans: (c) Vertebrata.
9. The stinging cells (nematocysts) are present in animals belonging to the phylum:
(a) Porifera.
(b) Cnidaria.
(c) Platyhelminthes.
(d) Annelida.
Ans: (b) Cnidaria.
10. Which of the following animals does not have a true body cavity (coelom)?
(a) Earthworm.
(b) Jellyfish.
(c) Roundworm.
(d) Snail.
Ans: (b) Jellyfish.
11. Animals belonging to the phylum Porifera are commonly known as:
(a) Jellyfish.
(b) Sponges.
(c) Corals.
(d) Sea stars.
Ans: (b) Sponges.
12. The digestive system of flatworms (phylum Platyhelminthes) is:
(a) Complete, with separate mouth and anus.
(b) Incomplete, with a single opening serving as both mouth and anus.
(c) Absent, they absorb nutrients through their skin.
(d) None of the above.
Ans: (b) Incomplete, with a single opening serving as both mouth and anus
13. Animals of the phylum Cnidaria possess specialised cells called cnidocytes that are used for:
(a) Digestion.
(b) Movement.
(c) Reproduction.
(d) Catching prey with stinging structures.
Ans: (d) Catching prey with stinging structures.
14. Which of the following developed for the first time in Annelids?
(a) Cephalization.
(b) Development of a true coelom.
(c) Metameric segmentation.
(d) Both 2 and 3
Ans: (d) Both 2 & 3
15. What is the most crucial reason for the immense success of arthropods?
(a) Chitinous exoskeleton.
(b) Uricotelic nature.
(c) Compound eye.
(d) Multipurpose appendages.
Ans: (a) Chitinous Exoskeleton.
