An animal in which metameric segmentation is present ?

Options

A. Sand worm
B. Earthworm
C. Round worm
D. Hook worm

Answer

To determine which animal exhibits metameric segmentation, we can follow these steps:

### Step 1: Understand Metameric Segmentation
Metameric segmentation refers to the division of an organism's body into repeated segments or sections. This is a characteristic feature of certain animal phyla.

### Step 2: Identify the Options
The options provided are:
- A) Sandworm
- B) Earthworm
- C) Downworm
- D) Hookworm

### Step 3: Analyze Each Option
- **A) Sandworm**: Sandworms belong to the class Polychaeta within the phylum Annelida, which does exhibit segmentation.
- **B) Earthworm**: Earthworms are also part of the phylum Annelida and are well-known for their clear metameric segmentation.
- **C) Downworm**: This term is less common and may refer to various types of worms, but it is not specifically known for metameric segmentation.
- **D) Hookworm**: Hookworms are parasitic and belong to the phylum Nematoda, which does not exhibit metameric segmentation.

### Step 4: Conclusion
Based on the analysis, both sandworms and earthworms belong to the phylum Annelida, which is characterized by metameric segmentation. However, the most recognized example of an animal with metameric segmentation is the earthworm.

### Final Answer
The animal in which metameric segmentation is present is **B) Earthworm**.

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