Question
Download Solution PDFWhich of the following animals can be cut into any number of pieces and each piece grows into a complete organism?
I. Hydra
II. Planaria
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is Both I and II.
Key Points
- Both Hydra and Planaria are capable of regeneration, a biological process where organisms replace or restore lost or amputated body parts.
- Hydra can be cut into any number of pieces, and each piece can grow into a complete organism.
- Planaria, a type of flatworm, also has remarkable regenerative abilities. Even small fragments can regenerate into a whole new organism.
- These abilities are primarily due to the presence of stem cells, which can differentiate into various cell types required to form a complete organism.
Additional Information
- Regeneration: The process by which organisms replace or restore body parts that have been lost or damaged.
- Stem Cells: Undifferentiated cells that have the ability to differentiate into various specialized cells and regenerate tissues.
- Hydra: A small, freshwater organism known for its regenerative abilities, belonging to the phylum Cnidaria.
- Planaria: Flatworms belonging to the class Turbellaria, known for their regenerative capabilities, especially studied in laboratory settings.
- Biological Research: Both Hydra and Planaria are extensively used in biological research to understand regeneration and stem cell biology.
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