Morphologically simillar but reproductively isolated species are called :-

Options

A. Neontological species
B. Sibling species
C. Allopatric species
D. Morpho-species

Answer

To solve the question "Morphologically similar but reproductively isolated species are called:", we can follow these steps:

### Step 1: Understand the Key Terms
- **Morphologically similar**: This means that the species look alike in terms of their physical characteristics.
- **Reproductively isolated**: This indicates that even though the species may look similar, they cannot interbreed or produce viable offspring.

### Step 2: Analyze the Options
1. **Neontological species**: These refer to species that exist in the present day. This term does not specifically relate to reproductive isolation.

2. **Sibling species**: This term is used to describe species that are morphologically indistinguishable (look very similar) but are reproductively isolated from each other. This fits the description in the question perfectly.

3. **Allopatric species**: These species are geographically isolated from each other, which can lead to reproductive isolation, but the term does not specifically refer to morphological similarity.

4. **Morpho species**: This term generally refers to groups of organisms that are differentiated based on morphological characteristics, but it does not imply reproductive isolation.

### Step 3: Identify the Correct Answer
Based on the analysis, the correct answer is **Sibling species**. These species are morphologically similar but cannot interbreed, making them reproductively isolated.

### Final Answer
Morphologically similar but reproductively isolated species are called **Sibling species**.

---