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What is the main function of the guard cells in leaves?
- a)To absorb water from the soil
- b)To regulate the opening and closing of stomata
- c)To synthesize carbohydrates
- d)To transport minerals through the plant
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
What is the main function of the guard cells in leaves?a)To absorb wat...
Guard cells surround the stomata and control their opening and closing, which regulates gas exchange and water loss in leaves.
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What is the main function of the guard cells in leaves?a)To absorb wat...
Main Function of Guard Cells:
Guard cells play a crucial role in the functioning of leaves by regulating the opening and closing of stomata. Stomata are tiny pores present on the surface of leaves that allow for the exchange of gases such as oxygen, carbon dioxide, and water vapor.
Regulating Stomatal Opening and Closing:
1. Opening: When guard cells are turgid (swollen with water), they bow outwards, creating an opening between them known as the stomatal pore. This allows for the influx of carbon dioxide needed for photosynthesis.
2. Closing: Conversely, when guard cells lose water and become flaccid, they close up, restricting the entry of carbon dioxide and reducing water loss through transpiration. This mechanism helps plants conserve water during dry conditions.
Importance of Stomatal Regulation:
1. Photosynthesis: By controlling stomatal opening, guard cells ensure an adequate supply of carbon dioxide for photosynthesis, the process by which plants produce food using sunlight.
2. Water Conservation: Guard cells help prevent excessive water loss by adjusting stomatal opening based on environmental conditions. This is especially important for plants growing in arid regions or during drought periods.
3. Temperature Regulation: Stomatal regulation also plays a role in temperature control. When stomata are open, water vapor is released through transpiration, cooling the leaf surface. Closing stomata reduces water loss and helps maintain optimal leaf temperature.
In conclusion, guard cells are essential for maintaining the balance between gas exchange and water conservation in plants. Their ability to regulate stomatal opening and closing ensures efficient photosynthesis, optimal water usage, and temperature regulation, contributing to the overall health and survival of plants.
Guard cells play a crucial role in the functioning of leaves by regulating the opening and closing of stomata. Stomata are tiny pores present on the surface of leaves that allow for the exchange of gases such as oxygen, carbon dioxide, and water vapor.
Regulating Stomatal Opening and Closing:
1. Opening: When guard cells are turgid (swollen with water), they bow outwards, creating an opening between them known as the stomatal pore. This allows for the influx of carbon dioxide needed for photosynthesis.
2. Closing: Conversely, when guard cells lose water and become flaccid, they close up, restricting the entry of carbon dioxide and reducing water loss through transpiration. This mechanism helps plants conserve water during dry conditions.
Importance of Stomatal Regulation:
1. Photosynthesis: By controlling stomatal opening, guard cells ensure an adequate supply of carbon dioxide for photosynthesis, the process by which plants produce food using sunlight.
2. Water Conservation: Guard cells help prevent excessive water loss by adjusting stomatal opening based on environmental conditions. This is especially important for plants growing in arid regions or during drought periods.
3. Temperature Regulation: Stomatal regulation also plays a role in temperature control. When stomata are open, water vapor is released through transpiration, cooling the leaf surface. Closing stomata reduces water loss and helps maintain optimal leaf temperature.
In conclusion, guard cells are essential for maintaining the balance between gas exchange and water conservation in plants. Their ability to regulate stomatal opening and closing ensures efficient photosynthesis, optimal water usage, and temperature regulation, contributing to the overall health and survival of plants.
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What is the main function of the guard cells in leaves?a)To absorb water from the soilb)To regulate the opening and closing of stomatac)To synthesize carbohydratesd)To transport minerals through the plantCorrect answer is option 'B'. Can you explain this answer? for Class 7 2025 is part of Class 7 preparation. The Question and answers have been prepared according to the Class 7 exam syllabus. Information about What is the main function of the guard cells in leaves?a)To absorb water from the soilb)To regulate the opening and closing of stomatac)To synthesize carbohydratesd)To transport minerals through the plantCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 7 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What is the main function of the guard cells in leaves?a)To absorb water from the soilb)To regulate the opening and closing of stomatac)To synthesize carbohydratesd)To transport minerals through the plantCorrect answer is option 'B'. Can you explain this answer?.
What is the main function of the guard cells in leaves?a)To absorb water from the soilb)To regulate the opening and closing of stomatac)To synthesize carbohydratesd)To transport minerals through the plantCorrect answer is option 'B'. Can you explain this answer? for Class 7 2025 is part of Class 7 preparation. The Question and answers have been prepared according to the Class 7 exam syllabus. Information about What is the main function of the guard cells in leaves?a)To absorb water from the soilb)To regulate the opening and closing of stomatac)To synthesize carbohydratesd)To transport minerals through the plantCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 7 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What is the main function of the guard cells in leaves?a)To absorb water from the soilb)To regulate the opening and closing of stomatac)To synthesize carbohydratesd)To transport minerals through the plantCorrect answer is option 'B'. Can you explain this answer?.
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