Plant cells lack

Options

A. centrioles
B. asters
C. spindle fibres
D. all the three

Answer

**Step-by-Step Solution:**

1. **Understanding Plant Cell Structure**:
- Plant cells have a unique structure that differentiates them from animal cells. They contain a rigid cell wall, chloroplasts for photosynthesis, and large central vacuoles.

2. **Identifying Key Organelles**:
- In animal cells, certain organelles like centrioles and asters play a crucial role in cell division. Centrioles are cylindrical structures that help in the formation of spindle fibers during mitosis.

3. **Role of Centrioles and Asters**:
- Centrioles are involved in organizing microtubules, which are essential for forming spindle fibers. Asters are star-shaped structures that form around centrioles during cell division and help in the proper alignment and separation of chromosomes.

4. **Comparing Plant and Animal Cells**:
- Unlike animal cells, plant cells do not have centrioles or asters. Therefore, they do not form spindle fibers in the same way during cell division. Instead, plant cells utilize a different mechanism for cell division involving a cell plate.

5. **Conclusion**:
- Since plant cells lack centrioles, asters, and spindle fibers, the correct answer to the question "Plant cells lack" is "all the three" (centrioles, asters, and spindle fibers).

**Final Answer**: Plant cells lack centrioles, asters, and spindle fibers.

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