Digestive tract with additional chamber crop and gizzard is a feature of

Options

A. Columba
B. Hemidactylus
C. Calotes
D. Exocoetus

Answer

To solve the question "Digestive tract with additional chamber crop and gizzard is a feature of," we will analyze the options provided and identify which one corresponds to the characteristic mentioned.

### Step-by-Step Solution:

1. **Understanding the Question**:
- The question asks about an organism that has a digestive tract with an additional chamber known as a crop and a gizzard. These structures are typically associated with certain groups of animals.

2. **Identifying the Options**:
- The options given are:
- Columba
- Hemidactylus
- Calotus
- Exocetus

3. **Analyzing Each Option**:
- **Columba**: This is the scientific name for pigeons. Pigeons are birds (Aves) and have a digestive system that includes a crop and gizzard, which are used for storing and grinding food.
- **Hemidactylus**: This is a genus of geckos, which are reptiles. Reptiles do not have a crop and gizzard; they have a simpler digestive tract.
- **Calotus**: This is a genus of skinks, which are also reptiles. Similar to Hemidactylus, skinks do not possess a crop and gizzard.
- **Exocetus**: This is a genus of flying fish. Fish have a different type of digestive system and do not have a crop and gizzard.

4. **Conclusion**:
- Based on the analysis, the only option that fits the description of having a digestive tract with a crop and gizzard is **Columba** (the pigeon). Therefore, the answer to the question is **Columba**.

### Final Answer:
The digestive tract with an additional chamber crop and gizzard is a feature of **Columba**.