Pisces and frogs are similar, as they are 

Options

A. poikilothermic amniotes
B. poikilothermic anamniotes
C. poikilothermic tetrapods
D. poikilothermic pentadactyle

Answer

To answer the question regarding the similarities between Pisces (fishes) and frogs, we can analyze the characteristics of both groups.

### Step-by-Step Solution:

1. **Understanding Pisces and Frogs**:
- Pisces refers to fish, which are aquatic animals with gills and fins.
- Frogs are amphibians, which can live both in water and on land.

2. **Identifying Common Characteristics**:
- Both fishes and frogs are cold-blooded animals, meaning they cannot regulate their body temperature internally.
- They both reproduce by laying eggs, but the environment for egg-laying differs.

3. **Examining the Options**:
- **Poikilotermic**: This term refers to organisms that cannot regulate their body temperature. Both fishes and frogs are poikilothermic.
- **Amniots**: This group includes animals that lay eggs with protective membranes, typically on land. Fishes and frogs do not fall into this category as they lay eggs in water.
- **Tetrapods**: Frogs are tetrapods (four-limbed), but fishes do not have limbs, so this option does not apply to both.
- **Pentadactyl**: This refers to having five digits on limbs, which applies to frogs but not to fishes.
- **Anamniots**: This term refers to animals that do not have an amniotic egg, which is true for both fishes and frogs as they lay eggs in water.

4. **Conclusion**:
- The correct similarity between Pisces and frogs is that they are both **poikilothermic** and **anamniotic**. However, since the question asks for a single similarity, the best answer is that they are **poikilothermic**.

### Final Answer:
Pisces and frogs are similar as they are **poikilothermic**.