What differentiates the Bactrian camels from the Arabian camels?

Options

A. The hump of the Bactrian camels contains reserve food in the form of fat. It is absent in the Arabian camels.
B. The stomach is four chambered in the Bactrian camel.
C. Each limb of the Bactrian camels has three digits.
D. The Arabian camel has one hump and the Bactrian camel found in the Gobi desert has two humps.

Answer

To differentiate the Bactrian camels from the Arabian camels, we can follow these steps:

### Step 1: Identify the Number of Humps
- **Bactrian Camels**: They have **two humps**.
- **Arabian Camels**: They have **one hump**.

### Step 2: Habitat and Geographic Distribution
- **Bactrian Camels**: They are primarily found in **Central and East Asia**, specifically in the **Gobi Desert**.
- **Arabian Camels**: They are mainly found in the **Arabian Peninsula** and parts of **Africa**.

### Step 3: Size Comparison
- **Bactrian Camels**: Generally, they tend to be **larger** than Arabian camels.
- **Arabian Camels**: They are usually **smaller** in comparison to Bactrian camels.

### Step 4: Adaptation to Climate
- **Bactrian Camels**: They can withstand **harsher climates**, with summer temperatures exceeding **120°F** and winter temperatures dropping to **-20°F**.
- **Arabian Camels**: They are adapted to the hot and arid conditions of the desert but do not experience the extreme temperature variations that Bactrian camels do.

### Step 5: Stomach Structure
- **Bactrian Camels**: They possess a **four-chambered stomach**.
- **Arabian Camels**: They also have a **four-chambered stomach**, but this feature is common to both types.

### Conclusion
The primary differences between Bactrian and Arabian camels lie in the number of humps, their geographic distribution, size, and ability to withstand extreme climates.