Animals which possess cleodoic eggs exhibit

Options

A. External ferlitization and internal development
B. Internal fertilization and internal development
C. Internal fertilization and external development
D. External fertilization and external development

Answer

To solve the question regarding animals that possess cleidoic eggs, we need to analyze the characteristics of cleidoic eggs and their associated reproductive strategies.

### Step-by-Step Solution:

1. **Understanding Cleidoic Eggs**:
- Cleidoic eggs are a type of egg that is characterized by having a protective shell and several membranes. This type of egg is found in reptiles and birds.

2. **Fertilization Process**:
- In animals that possess cleidoic eggs, fertilization occurs internally. This means that the sperm fertilizes the egg inside the female's body.

3. **Development Process**:
- After fertilization, the development of the embryo occurs externally. The fertilized egg is laid outside the female's body, where it continues to develop in the environment. The protective shell of the cleidoic egg provides a safe environment for the developing embryo.

4. **Evaluating the Options**:
- **Option 1**: External fertilization and internal development - This is incorrect as cleidoic eggs do not undergo external fertilization.
- **Option 2**: Internal fertilization and internal development - This is characteristic of mammals, not reptiles or birds.
- **Option 3**: Internal fertilization and external development - This is the correct option, as it accurately describes the reproductive strategy of reptiles and birds.
- **Option 4**: External fertilization and external development - This is typical of aquatic animals like amphibians and fish, not cleidoic eggs.

5. **Conclusion**:
- The correct answer is **Option 3: Internal fertilization and external development**. This aligns with the reproductive characteristics of animals that possess cleidoic eggs, such as birds and reptiles.