Worker termites are

Options

A. Wingless
B. Sterile
C. Blind
D. All the above.

Answer

To solve the question "Worker termites are," we need to analyze the characteristics of worker termites based on the provided options: wingless, sterile, blind, or all the above.

### Step-by-Step Solution:

1. **Understanding the Termite Structure**:
- Termites are social insects that belong to the phylum Arthropoda. They live in colonies that consist of different castes.

2. **Identifying the Castes**:
- There are two main castes in a termite colony: the fertile caste (which includes the queen and king) and the sterile caste (which includes workers and soldiers).

3. **Characteristics of Worker Termites**:
- **Wingless**: Worker termites do not have wings. This is a characteristic feature of the worker caste.
- **Sterile**: Worker termites are sterile, meaning they do not reproduce. They are responsible for various tasks in the colony, such as foraging and nest maintenance.
- **Blind**: Worker termites are also blind. They do not have well-developed eyes and rely on other senses to navigate and communicate within the colony.

4. **Conclusion**:
- Since worker termites are wingless, sterile, and blind, all the given options are correct. Therefore, the correct answer is **option 4: all the above**.

### Final Answer:
Worker termites are wingless, sterile, and blind. The correct answer is **all the above**.