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Animal Kingdom MCQ Solved Paper for UPSC CDS

Thursday 9th of March 2023

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1. In amphibians, heart is ________ chambered.
A. two
B. three
C. four
D. none of these
Answer : B
2. A student brought home a strange animal which he found outside under a rock. It had moist skin, a complete digestive tract, a ventral nerve cord, and had gone through torsion. Identify the phylum of the animal.
A. Porifera
B. Annelida
C. Mollusca
D. Echinodermata
Answer : B
3. Which of the following sets of animals give birth to young ones?
A. Platypus, Penguin, Bat, Hippopotamus.
B. Shrew, Bat, Cat, Kiwi.
C. Kangaroo, Hedgehog, Dolphin, Loris.
D. Lion, Bat, Whale, Ostrich.
Answer : C
4. Which of the following features distinguish mammals from other vertebrates ?
A. Hairy skin and oviparity
B. Hairy skin and mammary glands
C. Mammary glands and teeth
D. Pinna and teeth
Answer : B
5. Which of the follwoing statement(s) is/are correct?
(i) Organ systems in different group of animals show various patterns of complexities.
(ii) The digestive system in platyhelminthes has only a single opening to the outside of the body that serve as both mouth and anus, and is hence called complete.
(iii) In open type of circulatory system, the blood is pumped out of the heart and the cells and tissues are directly bathed in it.
(iv) In closed type, the blood is circulated through a series of vessels of varying diameters (arteries, veins and capillaries).

A. Only (i)
B. Both (ii) and (iii)
C. (i), (iii) and (iv)
D. All of these
Answer : C
6. Identify the correct characteristics of porifera.

  1. Commonly known as sea walnuts.

  2. Presence of ostia and collar cells.

  3. Exhibit tissue level of characteristics. 

  4. It is the largest phylum of animal kingdom.

  5. The body is supported by spicules and sponging fibers.

  6. Contains cnidocytes which is used for defense, anchorage and capturing of prey.


A. (ii), (v) only
B. (i), (ii), (vi) only
C. (i), (ii), (iii), (iv) only
D. All of these.
Answer : A
7. The transition from aquatic to terrestrial lifestyles required many adaptations in the vertebrate lineage. Which of the following is not one of those adaptations ?
A. Switch from gill respiration to air-breathing lungs.
B. Improvements in water resistance of skin.
C. Alteration in mode of locomotion.
D. Development of feathers for insulation.
Answer : D
8. Which of the following is a poisonous snake?
A. Naja (Cobra)
B. Bangarus (Krait)
C. Viper (Viper)
D. All of these
Answer : D
9. Match the phylum given in column - I with their example given in column - II and choose the correct option.
Column -IColumn- II
(Phylum)(Examples)
A. EchinodermataI. Ascidia, Doliolum
B. HemichordataII. Asterias, Ophiura
C. UrochordataIII. Branchiostoma
D. CephalochordataIV. Balanoglossus, Saccoglossus

A. A IV; B II; C I; D III
B. A II; B IV; C I; D III
C. A II; B IV; C III; D I
D. A II; B I; C IV; D III
Answer : B
10. __________ is responsible for maintaining the current of water in sponge.
A. Osculum
B. Porocytes
C. Spongocoel
D. Choanocytes
Answer : D
11. Which of the following feature is not correct regarding the figure given below? 
akimg16

A. It is an aquatic form.
B. Circulatory system is of open type.
C. It possesses parapodia for swimming.
D. Neural system consists of paired ganglia connected by lateral nerves to a double ventral nerve cord.
Answer : B
12. Which of the following is not a characteristic feature of kingdom animalia ?
A. Storage of carbohydrates as starch.
B. Multicellularity.
C. Obtaining nutrients by ingestion.
D. Having eukaryotic cells without walls.
Answer : A
13. Which of the following possesses electric organs and belongs to class chondrichthyes?
A. Torpedo
B. Petromyzon
C. Trygon
D. Exocoetus
Answer : A
14. A student was given a specimen to identify on the basis of the characteristics given below.
(i) They are metamerically segmented.
(ii) Presence of closed circulatory system.
(iii) They have circular and longitudinal muscles for locomotion. Identify the specimen.

A. Prawn
B. Pheretima
C. Wuchereria
D. Ctenoplana
Answer : B
15. Which of the following statements is incorrect ?
A. Prawn has two pairs of antennae.
B. Nematocysts are characteristic feature of the phylum cnidaria.
C. Millipedes have two pairs of appendages in each segment of the body.
D. Animals that belong to phylum porifera are exclusively marine.
Answer : D
16. Which of the following class is being described by the given statements (i - iv)?
(i) They are found in a variety of habitats- polar ice-caps, deserts, mountains, forests, grasslands and dark caves.
(ii) Most unique mammalian characteristic is the presence of mammary glands by which the young ones are nourished.
(iii) Heart is four-chambered.
(iv) Sexes are separate and fertilization is internal.

A. Reptilia
B. Aves
C. Mammalia
D. Amphibia
Answer : C
17. Match the phylum given in column - I with the special features present in them given in column - II and choose the correct option.
Column -IColumn- II
(Phylum)(Special features present)
A. PoriferaI. Mammary glands
B. MolluscaII. Cloaca
C. CtenophoraIII. Choanocytes
D. AmphibiaIV. Radula
E. MammaliaV. Comb plates

A. A III; B IV; C V; D II; E I
B. A IV; B III; C V; D II; E I
C. A III; B IV; C II; D V; E I
D. A III; B V; C IV; D II; E I
Answer : A
18. Which of the following character is absent in all chordates?
A. Diaphragm
B. Coelom
C. Pharyngeal gill clefts
D. Dorsal nerve cord
Answer : A
19. Which of the following phylum is being described by the given statements?
(i) These are primitive multicellular animals and have cellular level of organization.
(ii) Digestion is intracellular.
(iii) They have a water transport or canal system.
(iv) They reproduce asexually by fragmentation and sexually by formation of gametes.

A. Porifera
B. Ctenophora
C. Coelenterata
D. Platyhelminthes
Answer : A
20. Which of the following statement(s) is/are correct?
(i) Animals in which the cells are arranged in two embryonic layers, an external ectoderm and an internal endoderm, are called diploblastic animals.
(ii) Notochord is an ectodermally derived rod like structure formed on the ventral side during embryonic development in some animals.
(iii) In some animals, the body cavity is not lined by mesoderm, instead, the mesoderm is present as scattered pouches in between the ectoderm and endoderm and such a body cavity is called pseudocoelom.

A. Only (i)
B. Both (i) and (ii)
C. Both (i) and (iii)
D. All of these
Answer : C
21. Select the incorrect feature of mollusca from the given statements.

  1. Terrestrial or aquatic animals having cellular system level of organization.

  2. Radial symmetrical and acoelomate animals and possesses two germinal layers.

  3. A file like rasping organ called radula is present.

  4. Usually dioecious and viviparous animals.

  5. Examples include Pila, Octopus, and Dentalium.


A. (i) and (ii) only
B. (ii) and (iv) only
C. (i), (ii) and (iv) only
D. All the five statements.
Answer : C
22. Identify the figures A, B and C and choose the correct option. 
akimg7

A. A - Male Ascaris, B - Hirudinaria (leech), C- Nereis
B. A - Female Ascaris, B - Nereis, C-Hirudinaria (leech)
C. A - Female Ascaris B- Hirudinaria (leech), C - Nereis
D. A - Male Ascaris, B - Nereis, C- Hirudinaria (leech)
Answer : B
23. Tracheae of cockroach and mammal are similar in having
A. paired nature.
B. non-collapsible walls.
C. ciliated inner lining.
D. origin from head.
Answer : B
24. Which of the following is a fresh water sponge?
A. Sycon
B. Euspongia
C. Spongilla
D. Pleurobrachia
Answer : C
25. In phylum echinodermata, the adult echinoderms are ______A__________ but larvae are _______B______ .
A. A radially symmetrical; B bilaterally symmetrical
B. A bilaterally symmetrical; B radially symmetrical
C. A bilaterally symmetrical; B asymmetrical
D. A metamerically segmented; B asymmetrical
Answer : A
26. Which of the following characteristic is probably most responsible for the great diversification of insects on land ?
A. Segmentation
B. Antennae
C. Bilateral symmetry
D. Exoskeleton
Answer : D
27. Read the following statements and answer the question.
(i) They are exclusively marine, radially symmetrical, diploblastic organisms with tissue level of organisation.
(ii) Body bears eight external rows of ciliated comb plates, which help in locomotion.
(iii) Digestion is both extracellular and intracellular.
(iv) Reproduction takes place only by sexual means.
Which of the following phylum is being described by above statements?

A. Platyhelminthes
B. Arthropoda
C. Mollusca
D. Ctenophora
Answer : D
28. Few cnidarians like corals have a skeleton composed of
A. calcium hydroxide
B. calcium sulphate
C. calcium carbonate
D. sodium bicarbonate
Answer : C
29. Which of the following phylum is being described by the given statements?
(i) They are bilaterally symmetrical,triploblastic, segmented and coelomate animals.
(ii) The body consists of head, thorax, abdomen and have jointed appendages.
(iii) Circulatory system is of open type.
(iv) Excretion takes place through malphigian tubules.

A. Arthropoda
B. Annelida
C. Mollusca
D. Echinodermata
Answer : A
30. Which of the following traits is not shared by both sea anemones and jellyfish ?
A. A medusa as the dominant stage in the life cycle.
B. Possession of a gastro vascular cavity.
C. Sexual reproduction.
D. Nematocysts present on the tentacles.
Answer : A
31. Which one of the following statement regarding coelom of given animals is correct?
A. Round worms (aschelminthes) are pseudocoelomates.
B. Molluscs are acoelomates.
C. Insects are pseudocoelomates.
D. Flatworms (platyhelminthes) are coelomates.
Answer : A
32. The organisms attachedto the substratum generally possess
A. one single opening to the digestive canal.
B. cilia on the surface to create water current.
C. radial symmetry.
D. asymmetrical body.
Answer : C
33. Which of the following is not a characteristic of phylum echinodermata ?
A. They have a water vascular system.
B. They have an internal skeleton.
C. They are protostomes.
D. They have bilateral symmetry at larval stage.
Answer : C
34. Identify the figure with its correct name and phylum. 
akimg6

A. Sycon - Porifera
B. Aurelia - Coelenterata
C. Pleurobrachia - Ctenophora
D. Tapeworm - Platyhelminthes
Answer : D
35. Which of the following is a connecting link between invertebrates and non-invertebrates?
A. Sphenodon
B. Balanoglossus
C. Tadpole larva
D. Crocodile
Answer : B
36. Refer the given figures A, B, C and D and identify the option which shows their correct name. 
akimg3

A. A - Pleurobrachia, B - Cnidoblast, C - Aurelia, D - Adamsia
B. A - Aurelia, B - Adamsia, C - Cnidoblast, D - Pleurobrachia
C. A - Cnidoblast, B - Pleurobrachia, C - Adamsia, D - Aurelia
D. A - Adamsia, B - Aurelia, C - Pleurobrachia, D - Cnidoblast
Answer : B
37. Column-I contains organisms and column-II contains their exeretory structures. Choose the correct match form the options given below.
Column- IColumn -II
(Organism)(Excretory structures)
A. CockroachI. Nephridia
B. Cat fishII. Malpighian tubules
C. EarthwormIII. Kidneys
D. BalanoglossusIV. Flame cells
E. FlatwormV. Proboscis gland

A. A I; B III; C II; D IV; E V
B. A III; B I; C II; D V; E IV
C. A II; B I; C III; D V; E IV
D. A II; B III; C I; D V; E IV
Answer : D
38. The given figures (A & B) shows the germinal layer. The animals having structures shown in the figures are respectively called 
akimg1

A. diploblastic, triploblastic
B. triploblastic, diploblastic
C. diploblastic, diploblastic
D. triploblastic, triploblastic
Answer : A
39. Match the organisms given in column-I with their common name given in column-II and choose the correct option.
Column -IColumn -II
(Organisms)(Comman name)
A. PennatulaI. Sea-lily
B. AntedonII. Sea- pen
C. EchinusIII. Sea-urchin
D. CucumariaIV. Sea - cucumber

A. A II; C III; D I; E IV
B. A II; C IV; D I; E III
C. A II; C I; D III; E IV
D. A II; C I; D III; E IV
Answer : C
40. Refer the types of cells present in some animals. Each cell is specialized to perform a single specific function except
A. Cnidocytes
B. Choanocytes
C. Interstitial cells
D. Gastrodermal cells
Answer : C
41. Identify the figure with its correct name and phylum. 
akimg9

A. Cucumaria – Echinodermata
B. Ascidia – Urochordata
C. Balanoglossus – Hemichordata
D. Hirudinaria – Annelida
Answer : C
42. Which of the following is not a chordate character?
A. Presence of paired pharyngeal gill slits
B. Ventral heart
C. Solid and ventral nerve cord
D. Presence of post-anal tail
Answer : C
43. The combination of a true coelom and repeating body segmentation allows the annelids (unlike the anatomically simpler worms) to do which of the following?
A. Attain complex body shapes and thus locomote more precisely.
B. Move through loose marine sediments.
C. Be hermaphroditic.
D. Inject paralytic poisons into their prey.
Answer : A
44. Which of the following animal's body is covered by calcareous shell and unsegmented with a distinct head, muscular foot, and visceral hump? 
akimg17

A. Click to check answer
B. Click to check answer
C. Click to check answer
D. Click to check answer
Answer : C
45. Heart is three - chambered in reptiles, except
A. turtle
B. Chameleon
C. Naja (Cobra)
D. crocodile
Answer : D
46. Which of the following pairs of animals are similar to each other pertaining to the feature stated against them?
A. Pteropus and Ornithorhyncus - Viviparity
B. Garden lizard and crocodile - Three chambered heart
C. Ascaris and Ancylostoma - Metameric segmentation
D. Sea horse and flying fish - Cold blooded (poikilothermal)
Answer : D
47. Polyp phase is absent in
A. Hydra
B. Aurelia
C. Physalia
D. Obelia
Answer : B
48. Which of the following statement(s) is/are correct regarding phylum aschelminthes?
(i) The body is circular in cross-section hence the name roundworms.
(ii) Alimentary canal is complete with a well-developed muscular pharynx.
(iii) Sexes are separate (dioecious), i.e., males and females are distinct.
(iv) Nephridia help in osmoregulation and excretion.
A. (i) and (ii)
B. (iii) and (iv)
C. (i), (ii) and (iii)
D. All of these
Answer : C
49. Which of the following possesses poison sting and belongs to class chondrichthyes?
A. Labeo
B. Myxine
C. Clarias
D. Trygon
Answer : D
50. Flame cells present in platyhelminthes, are specialized in
A. respiration and absorption.
B. osmoregulation and circulation.
C. respiration and excretion.
D. osmoregulation and excretion.
Answer : D

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