Plants absorb sulphur in the form of

Options

A. `SO_(2)` from soil
B. `SO_(2)` from air
C. both (1) and (2)
D. `SO_(3)` from soil

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks in what form plants absorb sulfur. This requires knowledge of sulfur's chemical forms and how plants utilize them.

2. **Analyzing the Options**:
- **Option A**: SO2 from soil
- **Option B**: SO2 from air
- **Option C**: Both A and B
- **Option D**: SO3 from soil

3. **Identifying the Correct Form**:
- Sulfur can exist in various forms, but plants primarily absorb it in specific chemical forms.
- SO2 (sulfur dioxide) is a gas that can be absorbed by plants through their leaves.

4. **Mechanism of Absorption**:
- Plants take in SO2 from the air through small openings called stomata, which are located on the epidermis of leaves.
- This absorption occurs mainly during the day when stomata are open for gas exchange.

5. **Other Forms of Sulfur**:
- While plants can absorb sulfate ions (SO4^2-) from the soil, which is a common form of sulfur in soil, the question specifically asks about the form in which sulfur is absorbed.

6. **Conclusion**:
- Based on the analysis, the correct answer is that plants absorb sulfur in the form of SO2 from the air.

**Final Answer**: B. SO2 from air.

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