Thecodont,diphyodont and heterodont teeth are characteristic of

Options

A. Reptiles
B. Aves
C. Mammals/man
D. Amphibians

Answer

### Step-by-Step Text Solution:

1. **Understanding Thecodont Teeth**:
- Thecodont dentition refers to a type of tooth arrangement where the base of the tooth is completely enclosed in a deep socket of bone. This type of dentition is observed in various species, including mammals and reptiles such as crocodiles and dinosaurs.

2. **Understanding Diphyodont Teeth**:
- Diphyodont dentition is characterized by the presence of two sets of teeth during an organism's lifetime. Most mammals, including humans, are classified as diphyodonts because they develop a primary set of teeth (baby teeth) that are eventually replaced by a permanent set of teeth.

3. **Understanding Heterodont Teeth**:
- Heterodont dentition refers to the presence of teeth that vary in shape and size, serving different functions (e.g., incisors for cutting, canines for tearing, and molars for grinding). This type of dentition is typical in mammals, including humans, as it allows for a more efficient processing of different types of food.

4. **Conclusion**:
- Since all three types of dentition (thecodont, diphyodont, and heterodont) are characteristics found in mammals, the final answer to the question is that these types of teeth are characteristic of mammals (or specifically humans).