Which of the following pairs of organisms, possess stinging cells (nematocytes)?

Options

A. Sea fan and Sea pen
B. Cobra and Scorpion
C. Cockroach and Mosquito
D. Wasp and Honey bee

Answer

To determine which pair of organisms possess stinging cells (nematocytes), we can follow these steps:

### Step-by-Step Solution:

1. **Understand Nematocytes**: Nematocytes are specialized cells that contain stinging structures, primarily found in certain groups of animals, such as cnidarians. They are used for capturing prey and defense against predators.

2. **Review the Options**: We need to analyze each of the provided pairs of organisms to see if they possess nematocytes.

3. **Option 1: Sea Fan and Sea Pen**:
- Both Sea Fans and Sea Pens are types of cnidarians.
- They possess nematocytes, which they use for defense and to capture prey.
- **Conclusion**: This option is correct.

4. **Option 2: Cobra and Scorpion**:
- Cobras are snakes and do not have nematocytes; they have venom.
- Scorpions also have venom but do not possess nematocytes.
- **Conclusion**: This option is incorrect.

5. **Option 3: Cockroach and Mosquito**:
- Cockroaches and mosquitoes are insects and do not have nematocytes.
- They do not possess stinging cells; instead, they can act as vectors for diseases.
- **Conclusion**: This option is incorrect.

6. **Option 4: Wasp and Honey Bee**:
- Wasps and honey bees do have stinging capabilities, but they do not possess nematocytes.
- Their stings are a result of modified ovipositors and not true nematocytes.
- **Conclusion**: This option is incorrect.

7. **Final Answer**: Based on the analysis, the correct answer is **Option 1: Sea Fan and Sea Pen**.