Which one of following is incorrect?

Options

A. Movement through the apoplast does not involve crossing the cell membrane
B. Water is absorbed along with mineral solutes, by the root hairs, purely by diffusion
C. Apoplastic movement is dependent on the gradient
D. Symplast is the system of adjacent cell wall

Answer

To determine which statement is incorrect among the given options, let's analyze each one step by step.

### Step 1: Analyze Option 1
**Statement:** Movement through the epoplast does not involve crossing the cell membrane.
- **Explanation:** The epoplastic pathway involves the movement of water and solutes through the cell walls and intercellular spaces without crossing the cell membranes. This statement is **correct**.

### Step 2: Analyze Option 2
**Statement:** Water is absorbed along with mineral solute by the root hairs, purely by diffusion.
- **Explanation:** Water absorption occurs through osmosis, which is a type of diffusion. While diffusion is involved, the process is not purely diffusion as it also involves osmotic pressure. However, it is largely correct to say that water and minerals are absorbed through diffusion processes. This statement is **correct** but slightly misleading.

### Step 3: Analyze Option 3
**Statement:** Movement in epoplast is dependent on gradient.
- **Explanation:** The movement of water and solutes in the epoplastic pathway is indeed dependent on concentration gradients. The greater the gradient, the more efficient the movement. This statement is **correct**.

### Step 4: Analyze Option 4
**Statement:** Simplast is the system of adjacent cell wall.
- **Explanation:** The symplastic pathway refers to the movement of substances through the cytoplasm of adjacent cells, connected by plasmodesmata. It does not involve the cell wall. Therefore, this statement is **incorrect**.

### Conclusion
After analyzing all the options, the incorrect statement is **Option 4**: "Simplast is the system of adjacent cell wall."

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