Class 12 Biology Zoology | Chapter 1 Reproduction in Organisms | Textbook Evaluation Questions | Q.No 15 | 12th Bio Zoology | Chapter 1 | QB 15
QUESTION NO 15 : What is regeneration ? Explain its types.
Answer for obtaining full marks :
- Regeneration : Regrowth in an injured region.
- First studied in Hydra by Abraham Trembley in 1740.
- Two types :
- Morphallaxis : The whole body grows from a small fragment.
- Examples: Hydra and Planaria.
- In Hydra, each piece of a cut individual can regenerate lost parts and develop into a new individual, retaining original polarity (oral ends develop tentacles, aboral ends produce basal discs).
- Epimorphosis : Replacement of lost body parts.
- Two types :
- Reparative regeneration : Only certain damaged tissue can be regenerated.
- Example: Human beings (liver tissue).
- Restorative regeneration : Severed body parts can develop.
- Examples: Starfish, tail of wall lizard.
Answer for Slow Learners :
Answer :
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