Find out the incorrect statement

Options

A. In pseudocoelom, mesoderm is found as scattered pouches
B. Echinoderms , Arthropoda , Aschelminthes , Annelids are acoelomates
C. In tapeworm body cavity is absent.
D. Larva of echinodermata exhibit bilateral symmetry but their adults have radial symmetry.

Answer

To solve the question of identifying the incorrect statement, we will analyze each statement one by one:

### Step 1: Analyze Statement 1
**Statement 1**: In Pseudocoelom, mesoderm is found as scattered pouches.

- **Explanation**: In organisms with a pseudocoelom, the mesoderm does indeed form scattered pouches between the ectoderm and endoderm. This is a correct statement.

### Step 2: Analyze Statement 2
**Statement 2**: Echinoderms, Arthropoda, and Aschelminthes are acelomates.

- **Explanation**: This statement is incorrect. Echinoderms and Arthropoda are not acelomates; they are pseudocoelomates. Acelomates are organisms that lack a body cavity, while both Echinoderms and Arthropoda have a true coelom. Thus, this statement is false.

### Step 3: Analyze Statement 3
**Statement 3**: In tapeworms, body cavity is absent.

- **Explanation**: Tapeworms belong to the phylum Platyhelminthes, which are indeed acelomates. They do not have a body cavity. This statement is correct.

### Step 4: Analyze Statement 4
**Statement 4**: Larvae of Echinodermata exhibit bilateral symmetry, but the adults have radial symmetry.

- **Explanation**: This statement is true. Echinoderm larvae are bilaterally symmetrical, while adult forms exhibit radial symmetry. This is a well-known characteristic of Echinodermata.

### Conclusion
After analyzing all the statements, we find that the incorrect statement is **Statement 2**: "Echinoderms, Arthropoda, and Aschelminthes are acelomates."

### Final Answer
The incorrect statement is **Statement 2**.

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