The adsorption of water by hydrophilic compounds like cellulose
and pectin in root hair cell wall is called __________.

Options

A. Diffusion
B. Imbibition
C. Guttation
D. Osmosis

Answer

To solve the question regarding the adsorption of water by hydrophilic compounds like cellulose and pectin in the root hair cell wall, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the term that describes the process of water being adsorbed by hydrophilic compounds in root hair cells.

2. **Identifying Key Terms**: The key terms in the question are "adsorption," "water," "hydrophilic compounds," "cellulose," and "pectin."

3. **Analyzing the Options**: The options provided are diffusion, imbibition, guttation, and osmosis. We need to analyze each option to find the correct term.

4. **Option Analysis**:
- **Diffusion**: This is the movement of substances from an area of higher concentration to an area of lower concentration. It does not specifically refer to the adsorption of water by hydrophilic substances.
- **Imbibition**: This is the process where one substance absorbs water. In this context, it refers to the absorption of water by hydrophilic compounds like cellulose and pectin. This matches the description in the question.
- **Guttation**: This is the process of expelling water droplets from the pores of plants. It does not relate to the adsorption of water by compounds in the cell wall.
- **Osmosis**: This is the movement of solvent molecules through a selectively permeable membrane towards a higher solute concentration. This process involves a membrane and does not directly relate to the adsorption of water by hydrophilic compounds.

5. **Conclusion**: Based on the analysis, the correct term that describes the adsorption of water by hydrophilic compounds like cellulose and pectin in root hair cell walls is **imbibition**.

### Final Answer:
The adsorption of water by hydrophilic compounds like cellulose and pectin in root hair cell wall is called **imbibition**.