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Class 11 MCQ Questions of Animal Kingdom with Answers

Class 11 Biology MCQ Questions of Animal Kingdom with Answers are helpful board exams annd many more competitive examinations.  Animals are multicellular, heterotrophic, eukaryotic organisms that obtains nutrition from other organisms. These MCQ Questions for Class 11 Biology with answers clear for a speedy correction of the Chapter.

The animal kingdom is a vast kingdom that includes all the animals in the world. These animals are classified into different phyla and sub-phyla based on their characteristics, to make their identification easier.

Porifera is the most primitive animal group. The different phyla of the animal kingdom include- Phylum Arthropoda, Plylum, Annelida, Phylum Mollusca, Phylum Coelenterata, etc.

Let’s Start Practice of the (objective type) MCQ Questions of Animal Kingdom and revise the chapters in proper manner. These MCQ Questions are designed according to the Latest Exam Pattern and Syllabus.

Practice MCQ Questions for class 11 Biology

1. Classification of Porifera is based on

(a) spicules
(b) symmetry
(c) reproduction
(d) branching

2. The adults are radially symmetrical but larvae exhibit bilateral symmetry in

(a) Echinodermata
(b) Mollusca
(c) Hemichordata
(d) Cephalochordata

3. In Amoeba and Paramecium, osmoregulation occurs through

(a) contractile vacuole
(b) pseudopodia
(c) nucleus
(d) general surface

4. Jellyfish belongs to class 

(a) Hydrozoa
(b) Scyphozoa
(c) Anthozoa
(d) None of these

5. Transfer of Taenia to secondary host occurs as 

(a) oncosphere
(b) cysticercus
(c) morula
(d) egg

6.  Kala-azar and oriental sore are spread by 

(a) housefly
(b) bed bug
(c) sand fly
(d) fruit fly.

7. The body cavity formed by the splitting of the mesoderm is called

(a) pseudocoelom
(b) coelom
(c) haemocoel
(d) blastocoel

8. Pseudocoelom is found in

(a) cnidaria
(b) Platyhelminthes
(c) nematodes
(d) annelids

9. The cavity present in Hydra is called

(a) haemocoel
(b) coelom
(c) blastocoel
(d) coelenteron

10. Excretion in flatworms is by

(a) malpighian tubule
(b) nephridia
(c) flame cells
(d) nephrons

11. Which animal shows locomotion by setae?

(a) roundworm
(b) earthworm
(c) leech
(d) tapeworm

12. Which of the following has an ink gland?

(a) cuttlefish
(b) hydra
(c) snail
(d) oyster

13. The clam nervous system is composed of

(a) labial palps
(b) one pair of ganglia
(c) two pairs of ganglia
(d) three pairs of ganglia

14. Osteichthyes belongs to

(a) class amphibia
(b) super class Pisces
(c) super class tetrapoda
(d) division agnatha

15. Which kind of symmetry occurs in sea anemones?

(a) Bilateral
(b) Radial
(c) Asymmetry
(d) None of these

16. Bed Bugs contribute to the spread of

(a) Typhoid
(b) Yellow fever
(c) Typhus
(d) Trench fever

17. Which class has the largest number of animals?

(a) Fishes
(b) Reptiles
(c) Insects
(d) Mammals

18. Radial symmetry is found in

(a) Coelenterata and Platyhelminthes
(b) Coelenterata and Echinodermata
(c) Arthropoda and Mollusca
(d) Porifera and Coelenterata

19. Periplaneta belongs to which phylum?

(a) Mollusca
(b) Arthropoda
(c) Annelida
(d) Echinodermata

20. Salamander belongs to the class

(a) Pisces
(b) Aves
(c) Reptiles
(d) Amphibian.

21. The simplest type of canal system in Porifera is 

(a) ascon type
(b) leucon type
(c) sycon type 
(d) radial type

22. Aristotle’s lantern occurs in class 

(a) Echinoidea 
(b) Asteroidea
(c) Holothuroidea
(d) OphiuroideaAnswer : 

23. Coelom derived from blastocoel is known as

(a) enterocoelom
(b) schizocoelom
(c) pseudocoelom
(d) haemocoelom

24. Tube feet occur in 

(a) cockroach
(b) starfish
(c) cuttle fish 
(d) cat fish

25. Which one of the following has a four-chambered heart?

(a) frog
(b) snake
(c) crocodile
(d) lizard


1. Answer: (a) spicules

Explanation:  Porifera is the phylum composed of the sponges. They lack true tissues, have no body symmetry, and are sessile. The classification of phylum Porifera is based upon the presence and composition of spicules.

2. Answer: (a) Echinodermata

Explanation: Adult Echinodermata are radially symmetrical, while larvae are bilaterally symmetrical.

3. Answer: (a) contractile vacuole

Explanation:  In Amoeba and Paramoecium, osmoregulation happens through contractile vacuole. The pour moisture into the contractile vacuole. The contractile vacuole displaces water outside the body. Thus the contractile vacuoles and radial tubes are for osmoregulation.

4. Answer:(b) Scyphozoa

Explanation:  jellyfish, any planktonic marine member of the class Scyphozoa (phylum Cnidaria), a group of invertebrate animals composed of about 200 described species, or of the class Cubozoa (approximately 20 species).

5. Answer: (a) oncosphere

Explanation: The hexacanth, together with all the membranes surrounding it, is known as the oncosphere. The secondary or intermediate host acquires infection by ingesting the oncospheres

6. Answer: (c) sand fly

Explanation: The disease called Cutaneous Leishmaniasis (also known as oriental sore) is one of the most common forms of Leishmaniasis which affects the lives of humans. The bite of a sandfly spreads typically. Thus, both the diseases called Kala-azar and Oriental Sore are spread by Sandfly.

7. Answer: (b) coelom

Explanation:  In mollusks, annelids, and arthropods, the mesoderm (the middle germ layer) forms a solid mass of migrated cells from the single layer of the gastrula. The new mesoderm then splits, creating the pocket-like cavity of the coelom.

8. Answer: (c) nematodes

Explanation:  Pseudocoelom (false body cavity) is found in Ascaris (phylum Nematohelminthes or Aschelminthes). Pseudocoelom is a fluid-filled body hole extending inside the outside body wall of the nematode. Pseudocoelom is not completely lined with the mesodermal tissue.

9. Answer: (d) coelenteron

Explanation: The body cavity of a Hydra is called a Gastrovascular cavity. It is also known as coelenteron.

10. Answer: (c) flame cells

Explanation: Flatworms have an excretory system that consists of two tubules. The cells in the tubules are called flame cells; they have a cluster of cilia that propel waste matter down the tubules and out of the body.

11. Answer: (b) earthworm

Explanation: An earthworm moves using circular and longitudinal muscles, as well as bristles called setae. The earthworm can push the setae out of its body to grab the soil around it. To move forward, the worm uses its setae to anchor the front of its body and contracts the longitudinal muscles to shorten its body.

12. Answer: (a) cuttlefish

Explanation: With the exception of nocturnal and very deep water cephalopods, all Coleoidea (squid, octopus, and cuttlefish) which dwell in light conditions have an ink sac, which can be used to expel a cloud of dark ink in order to confuse predators.

13. Answer: (d) three pairs of ganglia

Explanation: The nervous system of clams consists of three pairs of ganglia connected by nerve cords. Nerves connect the ganglia and nerve cords to sensory cells. Different cells are specialized for various functions.

14. Answer: (c) super class tetrapoda

Explanation:  Osteichthyes is taxonomic superclass of the phylum Chordata (chordates) and includes groups of fish that have skeletons mainly composed of bone tissues.

15. Answer: (b) Radial

Explanation: Sea anemones, named after a terrestrial flower, have a basic radial symmetry with tentacles that surround a central mouth opening. The tentacles are used to catch food and transfer it to their mouth.

16. Answer: (c) Typhus

Explanation: Bed bugs, like the triatomines, can transmit Trypanosoma cruzi, the parasite that causes Chagas disease, one of the most prevalent and deadly diseases in the Americas, research has confirmed.

17. Answer: (c) Insects

Explanation:  The insects or class Insecta comprise the largest number of animals in the world. The total number of insect species is estimated at around 6 to 10 million and comprises over 90% of the animal life forms on Earth.

18. Answer: (b) Coelenterata and Echinodermata

Explanation:  Radial symmetry is found in the cnidarians (including jellyfish, sea anemones, and coral) and echinoderms (such as sea urchins, brittle stars, and sea stars).

19. Answer: (b)Arthropoda

Explanation:  Periplaneta belongs to  Arthropoda.

20. Answer: (d) Amphibian

Explanation: Because of their slender bodies and long tails, salamanders look somewhat like lizards so people often confuse the two. But lizards are reptiles, whereas salamanders are amphibians like frogs and toads.

21. Answer: (a) ascon type

Explanation:   The simplest type of canal system found in Sponges is Ascon type. Sycon type and leucon type of canal systems are advanced canal systems which are produced by folding in the body wall of ascon type of sponges.

22. Answer: (a) Echinoidea 

Explanation:  Aristotle’s lantern occurs in the class Echinoidea. Five teeth surrounding the mouth are attached to a masticatory apparatus, called Aristotle’s lantern, after its discoverer and because of its resemblance to an ancient Greek ship-lantern. Aristotle’s lantern is used in feeding.

23. Answer: (c) pseudocoelom

Explanation:  A pseudocoelom is a fluid-filled space between the body wall and the digestive tract found in roundworms.

 24. Answer: (b) starfish

Explanation: Tube feet (technically podia) are small active tubular projections on the oral face of an echinoderm, whether the arms of a starfish, or the undersides of sea urchins, sand dollars and sea cucumbers; they are more discreet though present on brittlestars, and have only a feeding function in feather stars.

25. Answer: (c) crocodile

Explanation: The crocodiles are only the reptile that has a four-chambered heart (two atria and two ventricles) because of the most complicated blood circulation of all vertebrates.

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