Body can be divided into identical halves in many planes, passing through central axis in

Options

A. an arthropod
B. a fish
C. a coelenterate
D. a mollusc

Answer

To solve the question "Body can be divided into identical halves in many planes, passing through the central axis," we need to identify the type of symmetry that allows this characteristic. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the Concept of Symmetry
- Symmetry in biology refers to the balanced proportions of an organism's body. There are different types of symmetry, primarily bilateral and radial symmetry.
- Bilateral symmetry means the body can be divided into two identical halves along one plane (the central axis).
- Radial symmetry means the body can be divided into identical halves along multiple planes that pass through the central axis.

**Hint:** Think about how many ways you can cut an organism to get two identical halves.

### Step 2: Identify the Types of Symmetry
- **Bilateral Symmetry:** Found in organisms like arthropods (e.g., insects, fish), where only one plane can divide the body into two identical halves.
- **Radial Symmetry:** Found in organisms like coelenterates (e.g., jellyfish, sea anemones), where multiple planes can divide the body into identical halves.

**Hint:** Consider examples of animals and how their body structures allow for division.

### Step 3: Analyze the Options
- The question presents several options, and we need to determine which group of organisms can be divided into identical halves in many planes.
- **Arthropods:** Exhibit bilateral symmetry.
- **Coelenterates:** Exhibit radial symmetry, allowing division in multiple planes.

**Hint:** Look for the organism that allows for division in multiple ways rather than just one.

### Step 4: Conclusion
- Since coelenterates can be divided into identical halves in many planes passing through the central axis, they are the correct answer to the question.

**Final Answer:** The correct option is **coelenterates**.