Identify the INCORRECT statement about regeneration.  

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RRB Technician Grade III Official Paper (Held On: 30 Dec, 2024 Shift 1)
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  1. Amoeba exhibit regeneration. 
  2. These specialist cells multiply rapidly and produce a large number of new cells. 
  3. Specialised cells are responsible for regeneration.  
  4. Hydra and Planaria show regeneration mode of reproduction 

Answer (Detailed Solution Below)

Option 1 : Amoeba exhibit regeneration. 
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The correct answer is Amoeba exhibit regeneration..

Key Points

  • Regeneration is a process whereby some organisms can regrow lost or damaged parts of their body.
  • Specialised cells are responsible for regeneration and they multiply rapidly to form new tissues.
  • Organisms such as Hydra and Planaria are known for their remarkable regenerative capabilities.
  • Amoeba, being a unicellular organism, does not exhibit regeneration as it reproduces by binary fission.

Additional Information

  • Binary Fission:
    • A type of asexual reproduction where a single organism divides into two equal parts, each becoming a new organism.
    • Amoeba reproduces through binary fission.
  • Hydra:
    • A small, freshwater organism known for its ability to regenerate entire bodies from small pieces.
    • Regeneration occurs through the proliferation of specialized cells called interstitial cells.
  • Planaria:
    • A type of flatworm capable of regenerating any part of its body.
    • Planaria utilize pluripotent stem cells known as neoblasts for regeneration.
  • Specialised Cells:
    • These cells have the ability to divide and differentiate to form various types of tissues and organs.
    • They play a crucial role in the regeneration process.
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