The level of organization in coelentrates is

Options

A. Acellular
B. Cellular
C. Tissue
D. Organ system

Answer

To determine the level of organization in coelenterates, we can follow these steps:

### Step 1: Identify the Group
Coelenterates, also known as cnidarians, include organisms such as jellyfish, corals, and sea anemones.

### Step 2: Understand Levels of Organization
Levels of biological organization refer to the complexity of the structure and function in organisms. They range from simple (cellular) to complex (organ systems).

### Step 3: Compare with Other Groups
- **Porifera (sponges)**: These organisms exhibit the cellular level of organization, where cells are not organized into tissues.
- **Coelenterates (Cnidarians)**: In this group, cells are organized into tissues, which perform specific functions.
- **Platyhelminthes (flatworms)**: These organisms show an organ level of organization.
- **Nematodes and higher phyla**: These have an organ system level of organization.

### Step 4: Conclusion
Since coelenterates have their cells organized into tissues, the level of organization in coelenterates is classified as **tissue level**.

### Final Answer
The level of organization in coelenterates is **tissue level**.

---