Eggs are covered with a tough, leathery coat in case of

Options

A. Sharks
B. Bony fishes
C. Lizards
D. Urochordates

Answer

To solve the question "Eggs are covered with a tough, leathery coat in case of", we need to analyze the options provided: sharks, bony fishes, lizards, and eurocordates.

### Step-by-Step Solution:

1. **Understanding Egg Development**:
- Eggs can develop either inside the female body (viviparous) or outside in a protective shell (oviparous). Oviparous organisms lay eggs that need protection from environmental conditions.

2. **Analyzing the Options**:
- **Sharks**: Sharks can be either oviparous or viviparous. However, since they are aquatic, their eggs do not require a tough leathery coat for protection.
- **Bony Fishes**: Similar to sharks, most bony fishes are oviparous and lay their eggs in water. They do not need a tough leathery coat as their eggs are also protected by the aquatic environment.
- **Lizards**: Lizards are terrestrial reptiles that lay eggs on land. Their eggs need protection from the harsh environmental conditions, which is why they have a tough, leathery coat. These eggs are referred to as cleidoic eggs.
- **Eurocordates**: Eurocordates are primarily aquatic organisms and, like sharks and bony fishes, their eggs do not have a tough leathery coat.

3. **Conclusion**:
- The only option where the eggs are covered with a tough, leathery coat is **lizards**. Therefore, the correct answer is **lizards**.

### Final Answer:
**Lizards**