Which one of the following pairs of animals are similar to each other pertaining to the feature stated against them

Options

A. Pteropus and Ornithorphyncus - Viviparity
B. Garden lizard and Crocodile - Three
chambered heart
C. Ascaris and Ancylostoma - Metameric
segmentation
D. Sea horse and Flying fish - cold blood-
ed (poikilothermal)

Answer

To solve the question regarding which pair of animals is similar to each other based on the stated features, we will analyze each pair one by one.

### Step-by-Step Solution:

1. **Pteropus and Ornithorhynchus (Viviparous vs. Oviparous)**:
- Pteropus, commonly known as the flying fox, is a viviparous organism, meaning it gives birth to live young.
- Ornithorhynchus, or the platypus, is oviparous, which means it lays eggs.
- **Conclusion**: This pair is not similar in terms of reproductive method.

**Hint**: Check the reproductive methods of both animals to determine if they match.

2. **Garden Lizard and Crocodile (Three-Chambered Heart)**:
- The garden lizard has a three-chambered heart.
- Crocodiles, however, are unique among reptiles as they possess a four-chambered heart.
- **Conclusion**: This pair is not similar in terms of heart structure.

**Hint**: Compare the heart structures of reptiles to see if they align.

3. **Ascaris and Ankylostoma (Metameric Segmentation)**:
- Ascaris (a type of roundworm) and Ankylostoma (hookworm) do not exhibit true metameric segmentation.
- Instead, they show pseudo-segmentation, which is not the same as true metameric segmentation.
- **Conclusion**: This pair is not similar in terms of body segmentation.

**Hint**: Look into the body structure of these worms to clarify their segmentation.

4. **Seahorse and Flying Fish (Cold-Blooded, Poikilotherm)**:
- Both seahorses and flying fish are classified as poikilothermic (cold-blooded) animals.
- They do not regulate their body temperature internally and rely on the environment.
- **Conclusion**: This pair is similar in terms of being cold-blooded.

**Hint**: Identify the temperature regulation method of both animals to confirm their similarity.

### Final Answer:
The correct pair of animals that are similar to each other based on the stated feature is **Seahorse and Flying Fish** as they are both cold-blooded (poikilothermic).