Which of the following is common in Annelida and Arthropoda?

Options

A. (a) Basal nerve cord
B. (b) Dorsal nerve cord
C. (c) Ventral nerve cord
D. (d) Anterior nerve cord

Answer

To determine what is common between Annelida and Arthropoda, we need to analyze the characteristics of both phyla and identify their similarities. Here's a step-by-step solution:

### Step 1: Identify the Phyla
- **Annelida**: This phylum includes segmented worms such as earthworms and leeches.
- **Arthropoda**: This phylum includes insects, arachnids, and crustaceans.

### Step 2: Examine the Characteristics of Annelida
- Annelids are characterized by their segmented body structure.
- They possess a complete digestive system.
- They have a ventral nerve cord (VNC).
- Some species have parapodia (paired appendages).

### Step 3: Examine the Characteristics of Arthropoda
- Arthropods are also segmented organisms.
- They have a complete digestive system.
- They possess a ventral nerve cord (VNC).
- They have paired appendages (legs, antennae).

### Step 4: Identify Common Features
- Both Annelida and Arthropoda are segmented.
- Both possess a complete digestive system.
- Both have a ventral nerve cord.
- Both have paired appendages.

### Step 5: Conclusion
From the analysis, the common feature between Annelida and Arthropoda is the **ventral nerve cord**. Therefore, the answer to the question is that the ventral nerve cord is a common characteristic in both phyla.

### Final Answer
The common feature in Annelida and Arthropoda is the **ventral nerve cord**.

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