Which is not characteristic feature of arthopods

Options

A. Jointed appendages
B. Moulting
C. Unsegmented body
D. Articulated exoskeleton.

Answer

To determine which feature is not characteristic of arthropods, we can analyze the given options systematically. Here’s a step-by-step solution:

### Step 1: Understand the Characteristics of Arthropods
Arthropods are a diverse group of invertebrates that share certain key features. Some of the main characteristics include:
- Jointed appendages (legs and antennae)
- Segmented body (divided into head, thorax, and abdomen)
- Exoskeleton made of chitin
- Molting process (ecdysis)

### Step 2: Analyze the Options
Let’s consider the options provided in the question:
1. Jointed appendages
2. Molting (ecdysis)
3. Unsegmented body
4. Articulated exoskeleton

### Step 3: Evaluate Each Option
- **Jointed appendages**: This is a defining characteristic of arthropods. They have limbs that are jointed.
- **Molting (ecdysis)**: This is also a characteristic feature, as arthropods must shed their exoskeleton to grow.
- **Unsegmented body**: This is NOT a characteristic of arthropods. In fact, arthropods have a segmented body structure.
- **Articulated exoskeleton**: This is a true characteristic of arthropods, as their exoskeleton is made of chitin and consists of articulated plates.

### Step 4: Identify the Incorrect Feature
From the evaluation, we see that the option stating "unsegmented body" is incorrect. Arthropods have a segmented body structure, which is a key characteristic.

### Conclusion
The feature that is NOT characteristic of arthropods is the **unsegmented body**.

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