The energy is required in absorption of water in

Options

A. Active absorption
B. Passive absorption
C. Both passive and active absorption
D. None of the above

Answer

### Step-by-Step Solution:

1. **Understanding Water Absorption in Plants**:
Water absorption in plants can occur through two main processes: active absorption and passive absorption.

2. **Defining Active Absorption**:
Active absorption refers to the process where water is absorbed against the concentration gradient. This means that water moves from an area of lower concentration of solutes to an area of higher concentration of solutes.

3. **Energy Requirement in Active Absorption**:
Since active absorption occurs against the concentration gradient, it requires energy. This energy is typically derived from ATP (adenosine triphosphate) produced during cellular respiration.

4. **Defining Passive Absorption**:
Passive absorption, on the other hand, occurs along the concentration gradient. This means that water moves from an area of higher concentration of water (or lower concentration of solutes) to an area of lower concentration of water (or higher concentration of solutes).

5. **Energy Requirement in Passive Absorption**:
In passive absorption, no energy is required because the movement of water is driven by the natural tendency of molecules to move from areas of higher concentration to areas of lower concentration.

6. **Conclusion**:
Given the question asks about the energy requirement in the absorption of water, the correct answer is that energy is required in active absorption.

### Final Answer:
The energy is required in absorption of water in **active absorption**.

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