Identify the incorrect match

Options

A. Porifera, ostia, choanocytes, indirect development, Sycon
B. Porifera, ostia, choanocytes, indirect development, Euspongia
C. Coelenterata, gastrovascular cavity, Cnidoblasts, direct development, Obelia
D. Ctenophora, comb plates, diploblastic, indirect development, Ctenoplana

Answer

To identify the incorrect match from the given options related to the animal kingdom, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Phylum Porifera**:
- Porifera, commonly known as sponges, have specialized cells called choanocytes (not koenocytes).
- They exhibit indirect development, which means their larval stage looks different from the adult form.

2. **Analyze the Phylum Cnidaria**:
- Cnidarians, such as jellyfish and corals, possess a gastrovascular cavity.
- They have specialized cells called cnidocytes, which contain stinging structures known as nematocysts.
- Cnidarians can exhibit both polyp (sessile) and medusa (motile) forms, and they typically undergo indirect development.

3. **Review the Phylum Ctenophora**:
- Ctenophores, also known as comb jellies, have unique structures called comb plates for locomotion.
- They are diploblastic, meaning they have two embryonic germ layers.
- They also exhibit indirect development.

4. **Identify the Incorrect Match**:
- The question states that Cnidaria does not have a gastrovascular cavity and mentions neuroblast, which is incorrect. Cnidarians do have a gastrovascular cavity, and the term neuroblast is not appropriate in this context.
- Therefore, the incorrect match is related to Cnidaria, specifically the statement about direct development.

### Conclusion:
The incorrect match is associated with the Phylum Cnidaria, where it is incorrectly stated that they do not have a gastrovascular cavity and that they exhibit direct development.