Bilaterally symmerical but acoelomate animal is

Options

A. Liver fluke
B. jelly fish
C. Round worm
D. Crab

Answer

To determine which animal is bilaterally symmetrical and acoelomate, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Bilateral Symmetry**:
- Bilateral symmetry means that the body can be divided into two equal halves along one plane. This is characteristic of many animal phyla, including Arthropoda and Platyhelminthes.

2. **Define Acoelomate**:
- An acoelomate is an organism that does not possess a coelom, which is a fluid-filled body cavity between the gut and the body wall. Acoelomates have solid bodies without this cavity.

3. **Identify Examples of Acoelomates**:
- The main group of acoelomates is the Platyhelminthes, which includes flatworms. Examples include planarians and liver flukes.

4. **Check the Options**:
- If we consider common examples of bilaterally symmetrical acoelomates, we find that the liver fluke (Fasciola) is a member of the Platyhelminthes and is both bilaterally symmetrical and acoelomate.

5. **Eliminate Incorrect Options**:
- Other options like jellyfish (which are radially symmetrical), roundworms (which are pseudocoelomates), and crabs (which are coelomates) do not fit the criteria of being acoelomate and bilaterally symmetrical.

6. **Conclusion**:
- Therefore, the correct answer to the question is the liver fluke (Fasciola), as it is bilaterally symmetrical and an acoelomate.

### Final Answer:
The bilaterally symmetrical but acoelomate animal is the liver fluke (Fasciola).

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