Radical tip is derived from which cell of embryo.

Options

A. Hypophysis
B. Vesicular cell
C. Haustorium
D. Whole suspensor

Answer

To answer the question "Radical tip is derived from which cell of the embryo?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Zygote Formation**: After fertilization, a diploid zygote is formed. This zygote is the starting point for the development of the embryo.

2. **Identifying the Ends of the Zygote**: The zygote has two ends: the micropilar end (where the egg cell is located) and the chalazal end (opposite end).

3. **Mitosis in the Zygote**: The zygote undergoes a transverse mitotic division, which means that the division occurs horizontally across the zygote.

4. **Formation of Basal and Terminal Cells**: This transverse division results in two cells:
- The cell towards the micropilar end is known as the **basal cell**.
- The cell towards the chalazal end is known as the **terminal cell**.

5. **Division of the Basal Cell**: The basal cell undergoes rapid transverse divisions, leading to the formation of multiple cells known as **suspensor cells**. The last cell of the suspensor, which is larger, is referred to as the **haustorium**.

6. **Division of the Terminal Cell**: The terminal cell undergoes further divisions in an anticlinical manner, leading to the development of the **pro-embryo**.

7. **Role of the Hypophysis**: The suspensor cell that is adjacent to the pro-embryo is called the **hypophysis**. This hypophysis is crucial as it develops into the **radical tip** (root tip) of the embryo.

8. **Conclusion**: Therefore, the radical tip is derived from the **hypophysis** cell of the embryo.

### Final Answer:
The radical tip is derived from the **hypophysis**.

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