Which is not a characteristic of Taenia ?

Options

A. Apolysis
B. Proglottides
C. Metamerism
D. Strobila

Answer

To determine which characteristic is not associated with Taenia, we will analyze the provided options one by one.

### Step-by-Step Solution:

1. **Understanding Taenia**: Taenia is a genus of parasitic flatworms, commonly known as tapeworms. They belong to the phylum Platyhelminthes and are characterized by their segmented bodies.

2. **Analyzing the Options**:
- **Apolysis**: This refers to the process where the exoskeleton is shed or differentiated from the epidermis. While this term is more commonly associated with arthropods, it can also relate to certain aspects of Taenia's biology. Therefore, this is a characteristic that can be associated with Taenia.

- **Proglottids**: These are the segments that make up the body of Taenia. Each proglottid is a self-contained unit with its own reproductive organs (both male and female), as well as parts of the excretory and nervous systems. This is a definitive characteristic of Taenia.

- **Strobila**: This term refers to the entire body of the tapeworm, which is made up of a series of proglottids. The presence of strobila is a characteristic feature of Taenia.

- **Metamerism**: This is the condition where similar body segments are serially repeated, as seen in annelids and arthropods. However, Taenia does not exhibit true metamerism because its body is made up of proglottids, which are not metameric segments. Instead, they are specialized segments that do not repeat the organ systems in the same way as metameric organisms.

3. **Conclusion**: The characteristic that is not associated with Taenia is **metamerism**.

### Final Answer:
The characteristic that is not associated with Taenia is **metamerism**.

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