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 Hydra
• B. Epimorphosis - Regeneration of old and dead erythrocytes by the new ones
• C. Morphallaxis - Healing up of a wound in the skin
• D. Epimorphosis - Regeneration of cursed and filtered out pieces of a planaria into as many new planarians

Answer 1

The correct option is A Morphallaxis - Regeneration of two transversely cut equal pieces of a Hydra into two small Hydra

The regeneration of the certain body part due to loss or death of existing tissue is known as morphallaxis. It takes place by rearrangement of existing tissue. The well-known example of morphallaxis is that of the Cnidarian hydra, where when the remaining severed sections form two fully functional and independent hydra. Thus the correct answer is option A.