Which of the following has four chambered heart?

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RRB NTPC CBT 2 Level -6 Official paper (Held On: 9 May 2022 Shift 1)
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  1. Peacock
  2. Sea horse
  3. Frog
  4. Fish

Answer (Detailed Solution Below)

Option 1 : Peacock
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Detailed Solution

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The correct answer is Peacock.

Key Points

  • Peacock has a four-chambered heart.
  • Peacock is the national bird of India and its scientific name is Pavo cristatus.
  • Taxonomy of Peacock:
    • Kingdom: Animalia
    • Phylum: Chordata
    • Subphylum: Vertebrata  
    • Superclass: Tetrapoda   
    • Class: Aves   
    • Order: Galliformes
    • Family: Phasianidae
    • Genus: Pavo
    • Species: cristatus

Additional Information

  • The frog belongs to the class Amphibia and has a characteristic three-chambered heart with 2 auricles and 1 ventricle.
  • Fishes have a two-chambered heart. 
  • Sea horses have a two-chambered heart
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