Which of the following root is modified to store food in turnip?

Options

A. Primary tap root
B. Rootlets of tap root
C. Fibrous root
D. Adventitious root

Answer

To solve the question "Which of the following root is modified to store food in turnip?", we can follow these steps:

### Step 1: Understand Root Types
First, we need to understand the different types of root systems in plants. The main types are:
- **Taproot System**: Characteristic of dicot plants where the primary root is long-lived and grows directly from the radical.
- **Fibrous Root System**: Common in monocots where the primary root is short-lived and many roots arise from the base of the stem.
- **Adventitious Root System**: Roots that arise from parts of the plant other than the radical.

**Hint**: Remember the characteristics of taproot, fibrous, and adventitious roots to identify which type is relevant for turnip.

### Step 2: Identify the Root Type in Turnip
Turnip is a dicot plant, and it has a **taproot system**. In turnip, the primary taproot is modified to store food. This modification results in a shape known as **napiform**, which is spherical and thick at the base.

**Hint**: Focus on the fact that turnip is a dicot and has a taproot system, which is key to understanding its structure.

### Step 3: Recognize the Modified Structure
In turnip, the swollen part of the taproot that stores food is primarily the **hypocotyl**. The hypocotyl is the part of the stem that is below the cotyledons and above the root. In the case of turnip, it becomes swollen and fleshy to store nutrients.

**Hint**: The term "hypocotyl" is crucial here; it indicates the specific part of the root that is modified for food storage.

### Step 4: Eliminate Incorrect Options
The question may provide other options such as:
- Rootlets (which are for absorption)
- Fibrous roots (which are not present in turnip)
- Adventitious roots (which arise from parts other than the radical)

Since these do not pertain to the food storage function in turnip, they can be eliminated.

**Hint**: Always consider the function of the roots when evaluating options.

### Step 5: Conclusion
Based on the analysis, the correct answer to the question is that the **primary taproot** of turnip is modified to store food, specifically in the form of a swollen hypocotyl.

**Final Answer**: The modified root that stores food in turnip is the **primary taproot**.