In Scoliodon, the thermoreceptors are

Options

A. ampullae of Lorenzini
B. lateral line system
C. neuromast organs
D. stato-acoustic organs

Answer

**Step-by-Step Solution:**

1. **Identify Scoliodon**: Scoliodon, commonly known as dogfish, is a type of fish that belongs to the class Chondrichthyes, which are cartilaginous fishes. This means that their skeletons are made of cartilage rather than bone.

2. **Understand the Need for Sensory Organs**: As Scoliodon lives underwater, it has developed various sensory organs to detect stimuli in its environment. These organs help the fish to respond to changes in its surroundings.

3. **Recognize Different Sensory Systems**: Scoliodon has several sensory systems, including:
- The inner ear (membranous labyrinth) which helps in detecting acceleration and changes in direction.
- The lateral line system, which consists of receptors that detect movement and pressure changes in the water.

4. **Focus on Thermoreceptors**: Thermoreceptors are specialized receptors that are sensitive to changes in temperature. In Scoliodon, these thermoreceptors are specifically known as the ampullae of Lorenzini.

5. **Conclude the Answer**: Therefore, the thermoreceptors in Scoliodon are the ampullae of Lorenzini.

**Final Answer**: In Scoliodon, the thermoreceptors are the ampullae of Lorenzini.

---