‘वाष्पोत्सर्जन एक आवश्यक बुराई है।’ इस कथन की व्याख्या कीजिए।
Answers
The loss of water in the form of vapors from aerial parts of the plant is called transpiration. Transpiration is said to be a necessary evil because it is an inevitable, but potentially harmful, consequence of the existence of wet cell surfaces form which evaporation occurs. Transpiration is essential for the movement of water and minerals from the root to the healthy parts of the plant. But excess transpiration may result in drying up of the leaves or wilting and loss of soil water. Hence it is termed as a necessary evil. Transpiration occurs through the stomata. Thus transpiration is called as a necessary evil because it is an inevitable process. The loss of water can lead to wilting, serious desiccation, and shortage of water. Transpiration helps in the ascent of the sap and the pulling of the water from the roots to the tips.
Answer:
- रंध्र के माध्यम से वाष्पोत्सर्जन होता है। इस प्रकार वाष्पोत्सर्जन को एक आवश्यक बुराई कहा जाता है क्योंकि यह एक अपरिहार्य प्रक्रिया है। पानी की कमी से विकटता, गंभीर अपवित्रता और पानी की कमी हो सकती है। वाष्पोत्सर्जन सैप की चढ़ाई और जड़ों से युक्तियों तक