Which is a connecting link

Options

A. Limulus
B. Peripatus
C. Periplanata
D. Pila.

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Question**: The question asks for a connecting link among the given options. A connecting link is an organism that exhibits characteristics of two different taxonomic groups.

2. **Analyzing the Options**:
- **Option A: Limulus (Horseshoe Crab)**: Limulus is not considered a connecting link. It is primarily classified as an arthropod.
- **Option B: Peripetus**: Peripetus is known as a connecting link between arthropods and annelids. It possesses features of both groups.
- **Option C: Periplaneta (Cockroach)**: Periplaneta is the scientific name for cockroach, which is an arthropod and does not serve as a connecting link.
- **Option D: Pila**: Pila is a mollusk and does not exhibit characteristics of both arthropods and annelids, hence it is not a connecting link.

3. **Identifying the Correct Answer**: Among the options, Peripetus is the only organism that exhibits traits of both arthropods and annelids, making it the correct answer.

4. **Characteristics of Peripetus**:
- **Arthropod Characteristics**: Claws, jaws, haemocoel, trachea, and a dorsal tubular heart.
- **Annelid Characteristics**: Continuous muscle layers in the body wall, unjointed legs, and presence of nephridia.

5. **Conclusion**: The correct answer to the question "Which is a connecting link?" is **B: Peripetus**.

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