Evolution of various forms of life is known as

Options

A. Chemography
B. Biogeny
C. Both (1) and (2)
D. Cognogeny

Answer

To answer the question "Evolution of various forms of life is known as," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the term that describes the evolution of different forms of life on Earth.

2. **Analyzing the Options**: We have four options to consider:
- **Chemography**: This term relates to the chemical processes in living organisms, not specifically to evolution.
- **Biogeny**: This refers to the theory that living organisms arise from pre-existing living organisms, which is more about the origin of life rather than the evolution of various forms.
- **Both 1 and 2**: This option suggests that both Chemography and Biogeny are correct, which we will evaluate later.
- **Cognogeny**: This term refers to the diversification and evolution of life forms over time.

3. **Identifying the Correct Term**:
- Chemography does not pertain to evolution.
- Biogeny focuses on the origin of life rather than the evolution of various forms.
- The option "Both 1 and 2" cannot be correct since neither Chemography nor Biogeny accurately describes the evolution of various life forms.
- Cognogeny is specifically related to the diversification and evolution of life forms, making it the most suitable answer.

4. **Conclusion**: Based on the analysis, the evolution of various forms of life is best described by the term **Cognogeny**.

### Final Answer:
The evolution of various forms of life is known as **Cognogeny**.