Organisms like Hydra and Planaria can regrow into complete individuals from cut pieces. What is this ability…

Question

Organisms like Hydra and Planaria can regrow into complete individuals from cut pieces. What is this ability called, and what type of cells make it possible?

Accepted Answer

## Model Answer This ability is called **regeneration**. It is made possible by **specialised cells** that proliferate and differentiate to form various cell types and tissues. Source: Chapter 7, Section 7.2.3 Regeneration --- ## Explanation For a 1-mark question, examiners expect two things in one line: the correct term (**regeneration**) and the type of cells (**specialised cells**). Don't confuse regeneration with reproduction — the passage explicitly states they are not the same. Both parts are needed for full credit.

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