Which of the following is known as age of mammals?

Options

A. Mesozoic
B. Paleozoic
C. Coenozoic
D. Archaeozoic

Answer

To determine which era is known as the "age of mammals," we can analyze the provided options step by step:

1. **Understanding the Options**:
- **Mesozoic Era**: This era is known as the age of reptiles or dinosaurs. It lasted from about 252 million years ago until 66 million years ago.
- **Paleozoic Era**: This is the earliest geologic era, lasting from about 454 million years ago to 251 million years ago. It is not specifically associated with mammals.
- **Cenozoic Era**: This era began around 66 million years ago and is known as the age of mammals, as mammals became the dominant land animals during this time.
- **Archeozoic Era**: This era lasted from about 3.8 billion to 2.5 billion years ago and is characterized by the presence of unicellular life and a very different atmosphere.

2. **Identifying the Age of Mammals**:
- The question specifically asks for the era in which mammals were the dominant species.
- Based on our analysis, we can see that the Cenozoic Era is the only era that fits this description.

3. **Conclusion**:
- Therefore, the correct answer to the question "Which of the following is known as the age of mammals?" is **Cenozoic Era** (Option 3).