Tap (primary) root is descending axis that develops from

Options

A. radicle
B. hypocotyl
C. epicotyl
D. radical

Answer

To answer the question about the tap (primary) root and its development, we will break down the information step by step.

### Step-by-Step Solution:

1. **Understanding the Tap Root**: The tap root is the main root that typically grows straight down into the soil. It is characterized by its thick, central structure.

2. **Origin of the Tap Root**: The tap root develops from the radicle, which is the embryonic root of the plant. The radicle is the first part of the seedling to emerge during germination.

3. **Role of the Radicle**: After the seed germinates, the radicle elongates and becomes the primary root, which is referred to as the tap root. This root system is essential for anchoring the plant and absorbing water and nutrients from deeper soil layers.

4. **Lateral Roots**: The tap root can give rise to lateral roots. These lateral roots branch off from the primary root and help in further anchoring the plant and increasing its ability to absorb water and nutrients.

5. **Conclusion**: Therefore, the tap root is a descending axis that develops from the radicle of the seed.

### Final Answer:
The tap (primary) root is a descending axis that develops from the radicle.

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