Rhizoplasts or rootlets are part of :-

Options

A. Centriole
B. Root hairs
C. Ciliary apparatus
D. Spindle

Answer

To answer the question "Rhizoplasts or rootlets are part of:", we will analyze the options provided and determine which one is correct.

### Step-by-Step Solution:

1. **Understanding Rhizoplasts**:
- Rhizoplasts, also known as rootlets, are specialized structures found in certain types of cells, particularly in ciliated and flagellated organisms. They play a role in the movement and functioning of cilia and flagella.

2. **Analyzing the Options**:
- **Option 1: Centrioles**:
- Centrioles are cylindrical structures involved in cell division and the formation of spindle fibers. They are not directly related to rhizoplasts.
- **Option 2: Root Hairs**:
- Root hairs are extensions of root epidermal cells in plants that help in water and nutrient absorption. They are not related to rhizoplasts.
- **Option 3: Ciliary Apparatus**:
- The ciliary apparatus includes structures like cilia and flagella, which are involved in movement. Rhizoplasts are associated with the ciliary apparatus as they help regulate the beating of cilia and flagella.
- **Option 4: Spindle**:
- The spindle is a structure that forms during cell division to separate chromosomes. It does not relate to rhizoplasts.

3. **Conclusion**:
- Based on the analysis, the correct answer is **Option 3: Ciliary Apparatus**. Rhizoplasts (or rootlets) are indeed part of the ciliary apparatus, as they are involved in the regulation of ciliary movement.

### Final Answer:
Rhizoplasts or rootlets are part of the **Ciliary Apparatus**.

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