All reptiles are

Options

A. Poilkiothermal and amniotic
B. Homoiothermal and amniotic
C. Poikilothermal and anamniotic
D. Homoiothermal and anamniotic

Answer

To answer the question "All reptiles are," we need to analyze the options provided and understand the characteristics of reptiles.

### Step-by-Step Solution:

1. **Understanding Reptiles**: Reptiles are a class of animals that belong to the phylum Chordata and are characterized by their scaly skin, laying of eggs, and being ectothermic (cold-blooded).

2. **Analyzing the Options**:
- **Poikilothermal and Amniotic**:
- **Poikilothermal**: This term means that reptiles cannot regulate their body temperature internally and their body temperature varies with the environment. This is true for reptiles.
- **Amniotic**: Reptiles lay eggs that are surrounded by a protective membrane called the amnion. This is also true for reptiles.
- **Homeothermal and Amniotic**:
- **Homeothermal**: This means that the organism can regulate its body temperature internally. This is not true for reptiles; they are poikilothermal.
- **Poikilothermal and Anamniotic**:
- **Anamniotic**: This refers to organisms that do not have a protective membrane around their eggs. This is not true for reptiles as they are amniotic.
- **Homeothermal and Anamniotic**:
- This option is incorrect for the same reasons as above; reptiles are not homeothermal and they are amniotic.

3. **Conclusion**: Based on the analysis, the correct answer is that all reptiles are **poikilothermal and amniotic**.

### Final Answer:
All reptiles are **poikilothermal and amniotic**.

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