A circle of vesicles appears at the equator of spindle towards the end of anaphase. It will form

Options

A. Cleavage furrow
B. Phragmoplast
C. Cell plate
D. Middle lamella

Answer

**Step-by-Step Solution:**

1. **Understanding the Context**: The question refers to a circle of vesicles that appears at the equator of the spindle during the late anaphase of cell division. This is a key moment in the process of cytokinesis.

2. **Identifying the Phase**: Anaphase is a stage in karyokinesis, which is the division of the nucleus. After karyokinesis, cytokinesis occurs, which is the division of the cytoplasm.

3. **Timing of Cytokinesis**: Cytokinesis typically begins during late anaphase or early telophase. This is when the cell starts to physically divide into two daughter cells.

4. **Types of Cytokinesis**: There are two types of cytokinesis:
- In animal cells, cytokinesis occurs through the formation of a cleavage furrow.
- In plant cells, it occurs through the formation of a cell plate.

5. **Role of Vesicles**: The circle of vesicles mentioned in the question is indicative of the process occurring in plant cells. These vesicles are derived from the Golgi apparatus and contain materials necessary for forming the cell plate.

6. **Formation of the Cell Plate**: The vesicles fuse together to form a structure called the cell plate. This cell plate is crucial for separating the two daughter cells in plant cytokinesis. The vesicles contain pectins (like calcium and magnesium pectate) that help in building the cell plate.

7. **Conclusion**: Since the question specifies that the circle of vesicles appears at the equator of the spindle during late anaphase, it indicates that these vesicles will form the cell plate in plant cells. Therefore, the correct answer is that the circle of vesicles will form the cell plate.

**Final Answer**: A circle of vesicles appears at the equator of the spindle towards the end of anaphase; it will form the cell plate.

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