Question

Planaria possesses high capacity of

• A. Regeneration
• B. Alternation of generations
• C. Bioluminescence
• D. Metamorphosis

Answer 1

Answer: (A)

Regeneration

Planaria possesses a high capacity for regeneration. After amputation, stump cells form a blastema formed from neoblasts which is a pluripotent cell found throughout the planarian body. The neoblast forms the whole new body from each fragment. It takes place by the following step:
1) At the point of amputation, the wound is healed by epithelial tissue.

2) The blastema is formed at the site of the wound.

3) Blastema cells proliferate by cell division and form a large clump of a cell which differentiates and regenerates the organs.

So, the correct answer is option A.