which of the following has dry skin with scales ?

Options

A. Hyla
B. Hemidactylus
C. Echinus
D. Rana

Answer

To determine which of the following organisms has dry skin with scales, we can follow these steps:

### Step 1: Identify the Classes of the Given Organisms
We need to know the classification of each organism mentioned in the question. The options are:
1. Hyla
2. Hemidactylus
3. Echinus
4. Rana

### Step 2: Classify Each Organism
- **Hyla**: This is a genus of frogs, which belong to the class Amphibia. Amphibians typically have moist skin.
- **Hemidactylus**: This is a genus of geckos, which are reptiles. Reptiles are known for having dry skin covered with scales.
- **Echinus**: This is a genus of sea urchins, which belong to the phylum Echinodermata. They are marine animals and do not have scales.
- **Rana**: This is another genus of frogs, also belonging to the class Amphibia, which again have moist skin.

### Step 3: Analyze the Characteristics of Each Class
- **Amphibia**: Characterized by moist skin, which is not dry and scaly.
- **Reptilia**: Characterized by dry skin covered with scales, which is typical for animals like lizards and snakes.
- **Echinodermata**: Characterized by a hard, spiny skin but not scales.

### Step 4: Identify the Correct Answer
From the analysis, we can see that:
- **Hemidactylus** (the gecko) belongs to the class Reptilia and has dry skin with scales.

### Conclusion
The organism with dry skin and scales is **Hemidactylus**.