Final answer:
Some animals can regenerate segments or body parts when damaged or lost due to the presence of specialized stem cells.
Step-by-step explanation:
The process of segment regeneration in organisms is often seen in certain animals such as starfish, planarians, and salamanders.
These animals have the ability to regrow individual segments or entire body parts if they are damaged or lost.
This regenerative capability is due to the presence of specialized cells called stem cells that can differentiate into different types of cells and regenerate the missing segments.