Which of the following is not a mammalian character

Options

A. Presence of milk producing glands
B. Skin is unique in possessing hair
C. Presence of external ears called pinnae
D. Homodont type of dentition

Answer

To determine which of the provided options is not a mammalian character, we will analyze each option step by step.

### Step 1: Understand the characteristics of mammals
Mammals are a class of animals that have specific defining features. These include:
- Presence of mammary glands that produce milk.
- Skin that is unique in possessing hair.
- Presence of external ears called pinna.
- Heterodont dentition, meaning they have different types of teeth (incisors, canines, molars).

### Step 2: Analyze the options
1. **Presence of milk-producing gland**: This is a defining characteristic of mammals, as they are named after the mammary glands that produce milk for their young.

2. **Skin is unique in possessing hair**: This is also a characteristic of mammals, as all mammals have some form of hair or fur on their bodies.

3. **Presence of external ear called pinna**: This is another mammalian trait, as many mammals have external ears that help in sound localization.

4. **Homodont type of dentition**: This refers to having similar types of teeth throughout the mouth. This is not a characteristic of mammals. Mammals typically exhibit heterodont dentition, which means they have different types of teeth adapted for various functions.

### Step 3: Conclusion
Based on the analysis, the option that is not a mammalian character is **homodont type of dentition**.

### Final Answer
The correct answer is: **Homodont type of dentition**.

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