Homolecithal eggs are found in :-

Options

A. Petromyzon , tunicates and chondrichythyes
B. Amphioxus , fish and amphibia
C. Amphioxus , tunicates and mammals
D. Birds , reptiles and monotrems

Answer

### Step-by-Step Solution:

1. **Understanding Homolecithal Eggs**:
- Homolecithal eggs are characterized by having a small amount of yolk that is uniformly distributed throughout the egg. This uniform distribution allows for even development of the embryo.

2. **Identifying Other Types of Eggs**:
- It is important to differentiate homolecithal eggs from other types:
- **Megalecithal Eggs**: These have a large amount of yolk, typically found in birds and reptiles.
- **Mesolecithal Eggs**: These contain a moderate amount of yolk, seen in amphibians and some other species.

3. **Examples of Organisms with Homolecithal Eggs**:
- Homolecithal eggs are also referred to as isolecithal eggs. They are found in:
- **Amphioxus** (a type of lancelet)
- **Tunicates** (marine invertebrates)
- **Mammals** (specifically some mammals, including humans)

4. **Conclusion**:
- Based on the characteristics and examples, the correct answer to the question "Homolecithal eggs are found in:" is **Amphioxus, Tunicates, and Mammals**.

### Final Answer:
Homolecithal eggs are found in **Amphioxus, Tunicates, and Mammals**.

---