Fixation of anther in which filament is attached to its whole length is

Options

A. Basifixed
B. Versatile
C. Dorsifixed
D. Adnate

Answer

To solve the question regarding the fixation of anther where the filament is attached to its whole length, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the type of anther fixation where the filament is attached along the entire length of the anther.

2. **Identify Types of Anther Fixation**: There are several types of anther fixation:
- Innate
- Dorsifixed
- Versatile
- Adenate

3. **Define Each Type**:
- **Innate**: The anther is directly at the top of the filament, which joins at the base of the anther.
- **Dorsifixed**: The filament is fixed to the back of the anther.
- **Versatile**: The filament is attached at the back, allowing the anther to swing.
- **Adenate**: The filament runs along the entire length of the anther and becomes continuous with the connective tissue.

4. **Identify the Correct Type**: From the definitions, the type where the filament is attached to the whole length of the anther is the **Adenate** type.

5. **Provide an Example**: An example of adenate anther fixation is found in the water lily.

6. **Conclude the Answer**: Therefore, the answer to the question is that the fixation of anther in which the filament is attached to its whole length is called **Adenate**.

### Final Answer:
The fixation of anther in which the filament is attached to its whole length is called **Adenate**.

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