Question

Based on cellular mechanisms there are two major types of regeneration found in the animals. Which one of the following is the correct example of the type mentioned?

• A. Morphallaxis- Regeneration of two transversely cut equal pieces of a Hydra into two small hydras
• B. Epimorphosis- Replacement of old and dead erythrocytes by the new ones
• C. Morphallaxis- Healing up of a wound in the skin
• D. Epimorphosis- Regeneration of crushed and filtered out pieces of a Planaria into as many new planarians

Answer 1

Answer: (A)

Morphallaxis- Regeneration of two transversely cut equal pieces of a Hydra into two small hydras

Epimorphosis is the regeneration of tissues or organs through the dedifferentiation of existing, differentiated adult tissues. Morphallaxis is the regeneration of a part or organism from a fragment by reorganization without cell proliferation.