Active uptake of minerals by roots mainly depends on the

Options

A. availability of oxygen
B. light
C. temperature
D. availability of `CO_(2)`

Answer

**Step-by-Step Solution:**

1. **Understanding Active Uptake**: Active uptake of minerals refers to the process by which plant roots absorb minerals from the soil against their concentration gradient. This process requires energy.

2. **Role of ATP**: The energy required for active transport comes from ATP (adenosine triphosphate), which is produced during cellular respiration.

3. **Importance of Oxygen**: Aerobic respiration, which occurs in the presence of oxygen, is the primary method by which plants generate ATP. Without sufficient oxygen, the rate of respiration decreases, leading to reduced ATP production.

4. **Mineral Transport Mechanism**: Minerals and water are transported through the plant via the xylem. The active transport of minerals into the root cells creates a concentration gradient that facilitates the movement of water and nutrients.

5. **Conclusion**: Therefore, the active uptake of minerals by roots mainly depends on the availability of oxygen, as it is crucial for aerobic respiration and ATP production.

**Final Answer**: The active uptake of minerals by roots mainly depends on the availability of oxygen.

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