Which condition is more advanced

Options

A. Bitegmic
B. Unitegmic
C. Tritegmic
D. Ategmic.

Answer

To determine which condition is more advanced among the options provided (bi-technic, uni-technic, tri-technic, or a-technic), we can analyze the types of ovules based on the number of integument layers they possess.

### Step-by-Step Solution:

1. **Understanding Integument Types**:
- The integument is a protective layer surrounding the ovule. The number of integument layers can indicate the complexity and advancement of the ovule.

2. **Identifying the Types of Ovules**:
- **A-tegmic**: These ovules lack any integument. They are considered the most primitive type and are typically found in some parasitic plants.
- **Uni-tegmic**: These ovules have a single integument layer. They are more advanced than a-tegmic ovules and are commonly found in gymnosperms.
- **Bi-tegmic**: These ovules have two integument layers. They represent a further advancement over uni-tegmic ovules.
- **Tri-tegmic**: These ovules possess three integument layers and are found in certain advanced angiosperms.

3. **Comparing the Conditions**:
- The advancement of ovules can be assessed by the number of integument layers. Generally, fewer integument layers indicate a more specialized and advanced condition.
- A-tegmic is the least advanced, followed by uni-tegmic, bi-tegmic, and tri-tegmic being the most advanced.

4. **Conclusion**:
- Based on the analysis, the most advanced condition among the options is **uni-tegmic**. This is because it has the least number of integument layers while still being more specialized than a-tegmic ovules.

### Final Answer:
The condition that is more advanced is **uni-tegmic**.