Science dealing with study of external form, size, colour ,structure and relative position of various parts of an organism is

Options

A. Anatomy
B. Morphology
C. Entomology
D. Histology

Answer

To solve the question regarding the science that deals with the study of external form, size, color, structure, and relative position of various parts of an organism, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for a specific branch of science that focuses on the external characteristics of organisms.

2. **Analyze the Options**:
- **Anatomy**: This is the study of the internal structure of organisms. It focuses on how organs and systems are arranged inside the body.
- **Morphology**: This branch of biology deals with the form and structure of organisms, including their external features such as size, shape, color, and the arrangement of body parts.
- **Entomology**: This is the study of insects, which does not pertain to the general study of external forms of all organisms.
- **Histology**: This is the study of tissues at a microscopic level, focusing on internal structures rather than external characteristics.

3. **Identify the Correct Answer**: Based on the definitions:
- Since the question specifically mentions the external form, size, color, structure, and relative position of various parts of an organism, the correct answer is **Morphology**.

4. **Conclusion**: The science that deals with the study of external form, size, color, structure, and relative position of various parts of an organism is **Morphology**.

### Final Answer:
**Morphology**