Which one of the following animals is correctly matched with its one characteristic and the taxon?

Options

A. Animal-Duckbilled platypus, Characteristic-Oviparous, Taxon-Mammalian
B. Animal-Milipede, Characteristics-Ventral nerve cord, Taxon-Arachnida
C. Animal-Sea anemone, Characteristic- Triploblastic, Taxon-Cnidaria
D. Animal-Silverfish, Characteristic-Pectoral and pelvic fins, Taxon-chordata

Answer

To solve the question of which animal is correctly matched with its characteristic and taxon, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Identify the First Option: Duck-billed Platypus**
- **Characteristic**: Oviparous (egg-laying)
- **Taxon**: Mammalia
- **Analysis**: The duck-billed platypus is indeed a mammal that lays eggs, making it an oviparous mammal. This is a correct match.

2. **Identify the Second Option: Millipede**
- **Characteristic**: Ventral nerve cord
- **Taxon**: Arthropoda
- **Analysis**: Millipedes do have a ventral nerve cord, but they belong to the class Diplopoda within the phylum Arthropoda, not Arachnida. Thus, this match is incorrect.

3. **Identify the Third Option: Sea Anemone**
- **Characteristic**: Triploblastic
- **Taxon**: Cnidaria
- **Analysis**: Sea anemones are actually diploblastic, meaning they have two germ layers (ectoderm and endoderm), not three. Therefore, this match is incorrect.

4. **Identify the Fourth Option: Silverfish**
- **Characteristic**: Pectoral and pelvic fins
- **Taxon**: Insecta
- **Analysis**: Silverfish do not have pectoral and pelvic fins as they are insects, not fish. They belong to the phylum Arthropoda, specifically the class Insecta. This match is also incorrect.

### Conclusion:
After analyzing all the options, the only correct match is:
- **Duck-billed Platypus**: Oviparous (egg-laying) and belongs to the taxon **Mammalia**.

Thus, the correct answer is **Option 1: Duck-billed Platypus**.