When any plane passing through the central axis of body and divides the animal into two identical halves. It is called as ________

Options

A. Assymmetry
B. Radial symmetry
C. Bilateral symmetry
D. Biradial symmetry

Answer

To answer the question "When any plane passing through the central axis of the body and divides the animal into two identical halves, it is called as ________," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question is asking about a specific type of symmetry in animals where a plane can divide the body into two identical halves.

2. **Identifying the Types of Symmetry**:
- **Asymmetry**: This type of symmetry refers to organisms that do not have any symmetry. An example is sponges, which do not exhibit any symmetrical structure.
- **Radial Symmetry**: This type of symmetry allows for multiple planes of symmetry. An organism with radial symmetry can be divided into identical halves through various planes that pass through the central axis. This is the correct answer for the question.
- **Bilateral Symmetry**: This type of symmetry involves only one plane of symmetry, dividing the organism into two mirror-image halves. This is not applicable here since the question specifies any plane through the central axis.
- **Biradial Symmetry**: This is a combination of radial and bilateral symmetry, but it does not apply to the question as it does not allow for division through multiple planes.

3. **Selecting the Correct Answer**: Based on the definitions and characteristics of the types of symmetry, the correct answer is **Radial Symmetry**. This is because it allows for division into identical halves through any plane passing through the central axis.

### Final Answer:
The correct answer is **Radial Symmetry**.