Loose cell aggregate type body plan is found in ___.

Options

A. Protozoa
B. Porifera
C. Coelenterata
D. Platyhelminthes

Answer

To solve the question "Loose cell aggregate type body plan is found in ___", we can follow these steps:

### Step 1: Understand the Question
The question is asking about the specific type of body plan known as "loose cell aggregate". We need to identify which group of organisms exhibits this body plan.

### Step 2: Analyze the Options
We have four options to consider:
1. Protozoa
2. Porifera
3. Selentra
4. Platyhelminthes

### Step 3: Evaluate Each Option
- **Option 1: Protozoa**
Protozoa are unicellular organisms and do not exhibit a loose cell aggregate body plan. They are individual cells and do not form aggregates.
**Conclusion**: This option is incorrect.

- **Option 2: Porifera**
Porifera, commonly known as sponges, are known for their loose cell aggregate body plan. They consist of a collection of cells that are not organized into true tissues or organs, which fits the description of a loose cell aggregate.
**Conclusion**: This option is correct.

- **Option 3: Selentra**
Selentra refers to multicellular organisms that have a more complex body structure. They do not exhibit a loose cell aggregate body plan.
**Conclusion**: This option is incorrect.

- **Option 4: Platyhelminthes**
Platyhelminthes, or flatworms, have a more organized body structure and are not characterized by a loose cell aggregate body plan.
**Conclusion**: This option is incorrect.

### Step 4: Final Answer
Based on the analysis, the correct answer is **Porifera**.