What is apolysis.

Explanation

### Step-by-Step Solution for the Question: What is Apolysis?

1. **Definition of Apolysis**: Apolysis is a biological process observed in certain parasitic organisms, particularly in tapeworms belonging to the phylum Platyhelminthes.

2. **Organism Context**: This process is specifically noted in the class Cestoda, which includes tapeworms. Tapeworms are flat, segmented worms that live in the intestines of their hosts.

3. **Structure Involved**: The strobila is the part of the tapeworm that consists of a chain of segments called proglottids. Each proglottid can contain mature eggs.

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