Which of these statements regarding modified roots and stem is incorrect ?

Options

A. In Asparagus , adventitious root is modified for food storage
B. Prop roots are for mechanical support
C. Underground stems of potato , ginger turmeric , zaminkand and colocasia are modified for photosynthesis
D. Onion is an example of modified shoot

Answer

To determine which statement regarding modified roots and stems is incorrect, we will analyze each statement one by one.

### Step 1: Analyze the first statement
**Statement:** In Asparagus, the adventitious root is modified for food storage.
**Analysis:** This statement is correct. Asparagus has adventitious roots that are indeed modified for storing food.

### Step 2: Analyze the second statement
**Statement:** Prop roots provide mechanical support.
**Analysis:** This statement is also correct. Prop roots, like those found in the banyan tree, provide essential mechanical support to the plant.

### Step 3: Analyze the third statement
**Statement:** Potato, ginger, turmeric, and colocasia are underground stems modified for photosynthesis.
**Analysis:** This statement is incorrect. These plants have underground stems that are modified for food storage, not for photosynthesis. Photosynthesis requires sunlight, which underground stems do not receive.

### Step 4: Analyze the fourth statement
**Statement:** Onion is an example of a modified shoot.
**Analysis:** This statement is correct. The onion is a modified shoot where the fleshy parts are modified leaves used for food storage.

### Conclusion
Based on the analysis, the incorrect statement is the one regarding potato, ginger, turmeric, and colocasia being modified for photosynthesis.

### Final Answer
The incorrect statement is: "Potato, ginger, turmeric, and colocasia are underground stems modified for photosynthesis."

---