How many of the following organisms show the type of symmetry which is similar tie actinomorphic flowers?
Spongilla , Adamsia, Gorgonia , pleuroblanchia , Taenia , Cucmaria , Ophiura

Options

A. 7
B. 6
C. 5
D. 4

Answer

To determine how many of the listed organisms exhibit symmetry similar to actinomorphic flowers, we need to identify the type of symmetry each organism possesses. Actinomorphic flowers exhibit radial symmetry, meaning they can be divided into equal halves from multiple planes.

Let's analyze each organism step by step:

1. **Spongilla**:
- Classification: Phylum Porifera
- Symmetry: Asymmetrical
- Conclusion: Does not exhibit radial symmetry.

2. **Adamsia**:
- Classification: Phylum Cnidaria
- Symmetry: Radial symmetry
- Conclusion: Exhibits radial symmetry.

3. **Gorgonia**:
- Classification: Phylum Cnidaria
- Symmetry: Radial symmetry
- Conclusion: Exhibits radial symmetry.

4. **Pleurobrachia**:
- Classification: Phylum Ctenophora
- Symmetry: Exhibits both radial and bilateral symmetry (rotational symmetry)
- Conclusion: Exhibits radial symmetry.

5. **Taenia**:
- Classification: Phylum Platyhelminthes
- Symmetry: Bilateral symmetry
- Conclusion: Does not exhibit radial symmetry.

6. **Cucumaria**:
- Classification: Phylum Echinodermata
- Symmetry: Radial symmetry
- Conclusion: Exhibits radial symmetry.

7. **Ophiura**:
- Classification: Phylum Echinodermata
- Symmetry: Radial symmetry
- Conclusion: Exhibits radial symmetry.

Now, summarizing the organisms that exhibit radial symmetry:
- Adamsia
- Gorgonia
- Pleurobrachia
- Cucumaria
- Ophiura

Total organisms showing radial symmetry (similar to actinomorphic flowers): **5**

Thus, the final answer is **5**.