In the amphibian order urodela

Options

A. Limbs are small in front and long behind
B. Limbs are of equal size
C. Hind limbs are absent in adults
D. Limbs are absent

Answer

**Step-by-Step Solution:**

1. **Understanding the Order Urodela**: Urodela is an order within the class Amphibia that primarily includes salamanders. It is essential to recognize that this order is characterized by specific anatomical features.

2. **Analyzing Limb Structure**: One of the key features of Urodela is the structure of their limbs. Unlike frogs (which belong to the order Anura), salamanders have limbs that are approximately equal in size.

3. **Comparing with Other Orders**: In Anura (frogs), the hind limbs are significantly larger than the front limbs, which aids in jumping. In contrast, Urodela's limbs do not exhibit this disparity; both front and hind limbs are of equal length.

4. **Identifying Incorrect Options**: The question also presents options that suggest certain characteristics. For instance, options stating that hind limbs are absent in adults or that limbs are entirely absent are incorrect for Urodela, as these traits are associated with the order Apoda, which consists of limbless amphibians.

5. **Conclusion**: Based on the analysis, the correct characteristic of Urodela is that the limbs are equal in size.

**Final Answer**: In the amphibian order Urodela, the limbs are equal in size.

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