Differentiation of various tissue and organs in respone to light is called

Options

A. morphogenesis
B. photomorphogenesis
C. organogenesis
D. embryogenesis

Answer

To answer the question "Differentiation of various tissue and organs in response to light is called," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question is asking for the term that describes how tissues and organs differentiate in response to light.

2. **Identify the Options**: The options provided are:
- Option 1: Morphogenesis
- Option 2: Photomorphogenesis
- Option 3: Organogenesis
- Option 4: Embryogenesis

3. **Define Each Term**:
- **Morphogenesis**: This refers to the biological process that causes an organism to develop its shape. It involves the differentiation of cells and tissues but is not specifically related to light.
- **Photomorphogenesis**: This is the process by which plants and some other organisms change their growth and development in response to light signals. It specifically involves the differentiation of tissues and organs influenced by light.
- **Organogenesis**: This is the process of organ formation from the embryonic germ layers. It does not specifically relate to light.
- **Embryogenesis**: This is the process of embryo development from a fertilized egg and is also not related to light.

4. **Analyze the Correct Option**: Among the definitions, photomorphogenesis is the only term that specifically refers to the differentiation of tissues and organs in response to light.

5. **Conclusion**: Therefore, the correct answer to the question is **Option 2: Photomorphogenesis**.