Animal Kingdom MCQs for all Exams

In this blog, we are going to discuss the Animal Kingdom, which is an important topic for exams such as SSC, UPSC, and state-level tests. This blog covers the classification, features, and characteristics of various animal groups, giving both theoretical insights and MCQs. These questions are specifically designed to make you understand the key concepts and help you prepare effectively for the exams. So, dive in and get better knowledge and ace those competitive tests.

Animal Kingdom

Animalia

• Are eukaryotic + multicellular + heterotrophic
• Do not have cell walls
• Most animals are mobile

Includes

1 – Porifera

2 – Coelenterata ( Cnidaria)

3- Platyhelminthes

4- Nematoda

5- Annelida

6 – Echinodermata

7 – Protochordata

8 – Vertebrata

9 – Mollusca

10 – Arthropoda

Classification on the basis of body symmetry

1 Asymmetrical
2 Radial symmetrical
3 Bilateral symmetrical

Classification on the basis of germinal layers

1 Diploblastic
2 Triploblastic

Classification on the basis of coelom

1 Coelomate
2 Acoelomate
3 Pseudocoelomate

Classification on the basis of Notochord

1 Non chordates
2 Chordates

Porifera

• Means – organisms with holes
• Are non-motile animals attached to some solid
  support
• Has holes or pores all over the body + Asymmetrical +
  Diploblastic + Coelom – absent + Notochord – Absent
• These lead to a canal system that helps in circulating
  water throughout the body to bring in food & oxygen
• Are covered with – hard outside layer or skeleton
• Commonly called – sponges
• Found in – marine habitats

Coelenterata ( Cnidaria)

• Are animals – living in water
• Radial symmetrical + Diploblastic
• Has – cavity in the body
• Body is made of 2 layers of cells:
  1- makes up cells on the outside of the body
  2- makes the inner lining of the body
• some live in – colonies (corals )
• others have – solitary, like – span (hydra)
• eg. – Jellyfish + Sea anemones

Platyhelminthes

• Body – complexly designed + bilaterally symmetrical + flattened therefore called – Flatworms
• There are 3 layers of cells from which differentiated tissues can be made, therefore called – Triploblastic
• There is – no true internal body cavity or coelom, in which well developed organs can be accommodated
• Are either – free living or parasitic
• Eg. – Planarians or parasitic animals like – Liverflukes

Nematoda

• Body – bilaterally symmetrical + triploblastic + cylindrical
• There are – tissues but no real ogans
• Present – body cavity or pseudocoelom
• Familiar as – parasitic worms causing diseases, such as – worms causing elephantiasis (filarial worms) or worms in intestines (roundworm or pinworms).

Annelida

• Body – bilaterally symmetrical + triploblastic + have true body cavity
• Body show segmentation lined up one after other from head to tail
• Found in – variety of habitats – fresh water
• marine water + land
• Eg. – Earthworms + leeches

Arthropoda

• Largest phylum of animals
• Have joined legs
• Are bilaterally symmetrical + segmented + triploblastic
• Has open circulatory system
• Coelomic cavity is blood filled
• Examples – prawns, butterflies, houseflies, spiders, scorpions and crabs

Mollusca

• Bilateral symmetry + little segmented + triploblastic
• Coelomic cavity reduced
• Have an open circulatory system
• kidney like organs for excretion
• Have foot
• Examples – snails, mussels ; etc.

Echinodermata

• Echinos = hedgehog + derma = skin ~ spiny skinned organisms
• Free living marine animals
• Triploblastic + have coelomic cavity
• Have water driven tube system
• Have hard calcium carbonate structures
• Examples – sea stars, sea urchins ; etc.

Protochordata

• Bilaterally symmetrical + triploblastic + have coelom
• Show – body design – notochord
• Marine animals
• Examples – balanoglossus, herdmania, amphioxus etc.

Vertebrates

• Have true vertebral column + internal skeleton
• Bilaterally symmetrical + triploblastic + coelomic + segmented
• Are grouped in 6 classes
• 1 Cyclostomata
• 2 Pisces
• 3 Amphibia
• 4 Reptilia
• 5 Aves
• 6 Mammalia

Cyclostomata

• Jawless vertebrates
• Have an elongated eel like body + circular mouth + slimy skin + scaleless
• Are ectoparasites or borers of other vertebrates
• Examples – petromyzon, myxine etc.

Pisces

• Body – streamlined + muscular tail
• Cold blooded + 2 chambered heart + lay egg
• Obtain oxygen by using gills
• Sharks – skeleton of cartilage
• Tuna or rohu – skeleton of bone + cartilage

Amphibia

• Lack scales + mucus glands ( skin) + 3 chambered heart
• Respiration – either gills or lungs
• Lay eggs
• Examples – frogs, toads, salamanders

Reptilia

• Cold blooded + have scales + breathe (lungs )
• 3 chambered heart,, {EXCEPTION – Crocodile, (4 chambered heart )}
• Lay eggs
• Examples – snakes, turtles, lizards, crocodiles.

Aves

• Warm blooded + four chambered heart + hollow bones + 2 forelimbs are modified for fight
• Lay eggs
• Breathe through lungs

Mammalia

• Warm blooded + four chambered heart + breathe through lungs
• Have mammary gland + skin has hair as well as sweat & oil glands
• Most mammals produce young ones
• Few lay eggs – platypus & echidna
• Kangaroos give birth to very poorly developed young ones.

MCQs on Animal Kingdom

Q1. Which of the following is not a feature of chordates?
a) Radial symmetry
b) Triploblastic
c) Coelomate
d) closed circulatory system

Option : A

Have a dorsal nerve cord

Bilaterally symmetrical

Have notochord

Have paired gill pouches

Q2. ___________are jawless vertebrate.
a) Cyclostomata
b) Pisces
c) Amphibians
d) Reptiles

Option : A

Q3. Which of the following is not a protochordate?
a) Balanoglossus
b) Herdmania
c) Amphioxus
d) Sea urchin

Option : D

Protochordata – bilaterally symmetrical + triploblastic + coelom

Echinus ( sea urchin) – Echinodermata.

Q4. Which is/are the characteristic(s) of mammals?
a) Hair on skin
b) presence of mammary gland
c) presence of ear pinna
d) all of these

Option : D

• Warm blooded + 4 chambered heart + coelomate
• Possess oil gland in their skin
• Respiration Occur through – lungs

Q5. Which of the following is not a mammal?
a) Whale
b) Dolphin
c) Shark
d) Bat

Option : C

Largest mammal – blue whales

Q6. _________are warm blooded.
a) Fishes
b) Amphibians
c) Reptiles
d) birds

Option : D

Others Flightless Birds – Kiwi, Rhea, Cassowary & Emu

Study of birds – ornithology

Largest sea bird – albatross

Largest bird – ostrich (flightless )

Q7. Which is correct about reptiles?
a) Scaled skin
b) internal fertilization
c) Oviparous
d) all of these

Option : D

Glass snake – lizard

Dinosaurs belongs to this phylum

Study of snakes – Serpentology or Ophiology

Q8. The scientific name of king cobra is –
a) Naja naja
b) Ophiophagus hannah
c) Viper russeli
d) Bangarus

Option : B

Indian King cobra- is the only snake in the world that builds a nest.

Q9. Sponges are found in /on
a) Land
b) Air
c) Water
d) All of these

Option : C

Spongilla- found in fresh water

Belongs to phylum – porifera.

Q10. Filaria worm in humans is –
a) Ascaris
b) Wuchereria
c) Ancylostoma
d) Trichinella

Option : B

Most common roundworm in humans is – Ascaris (Intestine ).

Question for You

Q. Which of the following is not a mollusca?
a) Snails
b) Octopus
c) Earthworms
d) Unio

Q11. Which of the following animals exhibits metamerism?
a) Jellyfish
b) Earthworm
c) Starfish
d) Snail
Option: b) Earthworm

Q12. What is the largest class in the phylum Arthropoda?
a) Crustacea
b) Insecta
c) Arachnida
d) Myriapoda
Option: b) Insecta

Q13. Which group of animals has a mantle?
a) Arthropods
b) Molluscs
c) Echinoderms
d) Annelids
Option: b) Molluscs

Q14. Which of the following animals has a three-chambered heart?
a) Lizard
b) Dog
c) Bird
d) Fish
Option: a) Lizard

Q15. Which phylum includes the simplest animals with a true coelom?
a) Porifera
b) Annelida
c) Nematoda
d) Arthropoda
Option: b) Annelida

Q16. Which of the following is an example of a filter feeder?
a) Octopus
b) Sponge
c) Starfish
d) Earthworm
Option: b) Sponge

Q17. In which phylum are nerve nets found?
a) Arthropoda
b) Coelenterata
c) Platyhelminthes
d) Mollusca
Option: b) Coelenterata

Q18. Which animal lacks a circulatory system?
a) Jellyfish
b) Octopus
c) Frog
d) Crab
Option: a) Jellyfish

Q19. The first terrestrial animals were:
a) Amphibians
b) Reptiles
c) Arthropods
d) Mammals
Option: c) Arthropods

Q20. Which phylum contains exclusively marine animals?
a) Mollusca
b) Echinodermata
c) Arthropoda
d) Platyhelminthes
Option: b) Echinodermata

Q21. Which of these animals shows alternation of generations?
a) Hydra
b) Obelia
c) Sponge
d) Octopus
Option: b) Obelia

Q22. Which animal belongs to class Chondrichthyes?
a) Goldfish
b) Shark
c) Frog
d) Starfish
Option: b) Shark

Q23. Which of the following is NOT a feature of aves?
a) Hollow bones
b) Mammary glands
c) Feathers
d) Four-chambered heart
Option: b) Mammary glands

Q24. Which phylum has a body divided into a head, thorax, and abdomen?
a) Annelida
b) Arthropoda
c) Mollusca
d) Echinodermata
Option: b) Arthropoda

Q25. The characteristic feature of echinoderms is:
a) Segmented body
b) Radial symmetry in adults
c) Open circulatory system
d) Absence of skeleton
Option: b) Radial symmetry in adults

Q26. Which group has endoskeleton made of cartilage?
a) Amphibia
b) Chondrichthyes
c) Mammals
d) Aves
Option: b) Chondrichthyes

Q27. The vertebral column replaces the notochord in:
a) Protochordates
b) Vertebrates
c) Echinoderms
d) Arthropods
Option: b) Vertebrates

Q28. What is the study of fishes called?
a) Entomology
b) Ichthyology
c) Herpetology
d) Ornithology
Option: b) Ichthyology

Q29. Which group of animals is poikilothermic?
a) Birds
b) Mammals
c) Reptiles
d) Amphibians
Option: c) Reptiles

Q30. Which of the following has a placoid scale?
a) Shark
b) Whale
c) Frog
d) Tuna
Option: a) Shark

Q31. Which of the following animals has a closed circulatory system?
a) Cockroach
b) Octopus
c) Prawn
d) Starfish
Option: b) Octopus

Q32. Animals with both male and female reproductive organs are called:
a) Oviparous
b) Viviparous
c) Hermaphrodites
d) Dioecious
Option: c) Hermaphrodites

Q33. Which of the following is NOT a function of the coelom?
a) Housing organs
b) Transporting gases
c) Providing a hydrostatic skeleton
d) Photosynthesis
Option: d) Photosynthesis

Q34. Which animal is known as a “living fossil”?
a) Coelacanth
b) Starfish
c) Jellyfish
d) Sponge
Option: a) Coelacanth

Q35. Cephalization is first observed in which phylum?
a) Porifera
b) Coelenterata
c) Platyhelminthes
d) Mollusca
Option: c) Platyhelminthe

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