Which of the following is the correct combination of the class of vertebrates and properties exhibited by it?

Options

A. Internal fertilization , Aves and Reptilia
B. Oviparity : Chondrichthyes and Osteichthyes
C. Poikilothermic : Amphibia and Mammalia
D. Three chambered heart : Amphibia and Aves

Answer

To solve the question regarding the correct combination of the class of vertebrates and the properties exhibited by them, we will analyze each option provided in the question step by step.

### Step-by-Step Solution:

1. **Understanding Internal Fertilization**:
- Internal fertilization occurs when the sperm fertilizes the egg inside the female's body.
- This process is typical in classes such as **Aves (birds)** and **Reptilia (reptiles)**.
- Therefore, the combination of internal fertilization with apes and reptiles is **correct**.

2. **Analyzing Oviparity with Chondrichthyes and Osteichthyes**:
- Oviparity refers to the laying of eggs.
- Both **Chondrichthyes (cartilaginous fish like sharks)** and **Osteichthyes (bony fish)** can exhibit oviparity, but they can also exhibit viviparity (giving birth to live young).
- Therefore, this combination is **incorrect** because it does not specify that both classes can exhibit both reproductive strategies.

3. **Evaluating Poikilothermic with Amphibia and Mammalia**:
- Poikilothermic organisms cannot regulate their body temperature and are typically cold-blooded.
- **Amphibians** are indeed poikilothermic, but **Mammals** (Mammalia) are homeothermic, meaning they can regulate their body temperature.
- Thus, this combination is also **incorrect**.

4. **Examining Three-Chambered Heart in Amphibia and Aves**:
- Amphibians have a three-chambered heart.
- However, **Aves (birds)** possess a four-chambered heart.
- Therefore, this combination is **incorrect**.

### Conclusion:
After analyzing all the combinations, the only correct option is the first one, which states that internal fertilization occurs in apes and reptiles.

### Final Answer:
The correct combination of the class of vertebrates and properties exhibited by it is **Internal Fertilization with Apes and Reptilia**.

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