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Presence of moisture in the atmosphere...

Presence of moisture in the atmosphere

A

Increases rate of transpiration

B

Decreases rate of transpiration

C

Does not affect rate of transpiraton

D

Transpiratoin becomes repid

Text Solution

AI Generated Solution

The correct Answer is:
### Step-by-Step Solution: 1. **Understanding Transpiration**: - Transpiration is the process through which plants lose water vapor from their aerial parts, primarily through small openings called stomata. This process is crucial for maintaining plant health and regulating temperature. 2. **Factors Affecting Transpiration**: - Several environmental factors influence the rate of transpiration, including temperature, humidity, wind speed, and light intensity. Each of these factors can either increase or decrease the rate at which water is lost from the plant. 3. **Role of Humidity**: - Humidity refers to the amount of moisture present in the atmosphere. When humidity is high, the air is saturated with moisture, which affects the concentration gradient between the inside of the leaf and the external environment. 4. **Impact of High Humidity on Transpiration**: - When the atmosphere has a high level of moisture (high humidity), the concentration gradient between the leaf and the air decreases. This means that there is less driving force for water to evaporate from the leaf into the air. 5. **Conclusion**: - As a result of the high moisture content in the atmosphere, the rate of transpiration decreases. Therefore, the correct answer to the question is that the presence of moisture in the atmosphere decreases the rate of transpiration. ### Final Answer: - The presence of moisture in the atmosphere **decreases the rate of transpiration**. ---
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