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Tiny pores are found on the surface of the leaves of plants. These pores are called stomata. These stomata surrounded by the kidney shaped guard cells provide many vital functions to the plants.
Which of the following functions is not served by the stomata for the plants?
- a)Exchange of gases, particularly CO2 and O2, with atmosphere
- b)Loss of water in the form of vapours during transpiration
- c)Helps to create pressure for the water to rise upward, by its process of transpiration
- d)Helps the leaves to carry out the process of photosynthesis
Correct answer is option 'D'. Can you explain this answer?
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Tiny pores are found on the surface of the leaves of plants. These po...
Stomata and their Functions
Stomata are tiny pores found on the surface of leaves, typically in the lower epidermis. These pores are surrounded by two specialized cells called guard cells, which have a kidney-shaped structure. Stomata play several vital roles in the life of a plant. Let's discuss each of these functions in detail:
1. Exchange of Gases (CO2 and O2)
Stomata are primarily responsible for the exchange of gases between the plant and the atmosphere. During photosynthesis, plants require carbon dioxide (CO2) for the synthesis of carbohydrates. Stomata facilitate the entry of CO2 into the leaves. On the other hand, oxygen (O2) produced as a byproduct of photosynthesis is released through the stomata into the atmosphere.
2. Loss of Water (Transpiration)
Transpiration is the process by which plants lose water in the form of vapor through the stomata. This loss of water is crucial for maintaining the plant's temperature, as it helps in cooling the leaves. Additionally, transpiration creates a pulling force that enables the upward movement of water and nutrients from the roots to the leaves. This process is known as the transpiration stream.
3. Creation of Pressure for Water Movement
As mentioned earlier, transpiration creates a pulling force that aids in the movement of water and minerals from the roots to the leaves. When water evaporates from the stomata, it creates a negative pressure or tension in the xylem vessels. This tension helps in the movement of water upwards through the plant's vascular system, against the force of gravity. This process is called the cohesion-tension theory.
4. Facilitating Photosynthesis (Not served by Stomata)
Photosynthesis is the process by which plants convert sunlight, water, and carbon dioxide into glucose and oxygen. While stomata play a crucial role in gas exchange (CO2 and O2), they do not directly participate in the process of photosynthesis. The actual site of photosynthesis is the chloroplasts present in the mesophyll cells of the leaves. Stomata indirectly support photosynthesis by allowing the entry of carbon dioxide, which is an essential raw material for this process.
In conclusion, the stomata surrounded by guard cells serve multiple vital functions for plants, including the exchange of gases, loss of water through transpiration, and creation of pressure for water movement. However, they do not directly participate in the process of photosynthesis, which occurs within the chloroplasts of the mesophyll cells.
Stomata are tiny pores found on the surface of leaves, typically in the lower epidermis. These pores are surrounded by two specialized cells called guard cells, which have a kidney-shaped structure. Stomata play several vital roles in the life of a plant. Let's discuss each of these functions in detail:
1. Exchange of Gases (CO2 and O2)
Stomata are primarily responsible for the exchange of gases between the plant and the atmosphere. During photosynthesis, plants require carbon dioxide (CO2) for the synthesis of carbohydrates. Stomata facilitate the entry of CO2 into the leaves. On the other hand, oxygen (O2) produced as a byproduct of photosynthesis is released through the stomata into the atmosphere.
2. Loss of Water (Transpiration)
Transpiration is the process by which plants lose water in the form of vapor through the stomata. This loss of water is crucial for maintaining the plant's temperature, as it helps in cooling the leaves. Additionally, transpiration creates a pulling force that enables the upward movement of water and nutrients from the roots to the leaves. This process is known as the transpiration stream.
3. Creation of Pressure for Water Movement
As mentioned earlier, transpiration creates a pulling force that aids in the movement of water and minerals from the roots to the leaves. When water evaporates from the stomata, it creates a negative pressure or tension in the xylem vessels. This tension helps in the movement of water upwards through the plant's vascular system, against the force of gravity. This process is called the cohesion-tension theory.
4. Facilitating Photosynthesis (Not served by Stomata)
Photosynthesis is the process by which plants convert sunlight, water, and carbon dioxide into glucose and oxygen. While stomata play a crucial role in gas exchange (CO2 and O2), they do not directly participate in the process of photosynthesis. The actual site of photosynthesis is the chloroplasts present in the mesophyll cells of the leaves. Stomata indirectly support photosynthesis by allowing the entry of carbon dioxide, which is an essential raw material for this process.
In conclusion, the stomata surrounded by guard cells serve multiple vital functions for plants, including the exchange of gases, loss of water through transpiration, and creation of pressure for water movement. However, they do not directly participate in the process of photosynthesis, which occurs within the chloroplasts of the mesophyll cells.
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Tiny pores are found on the surface of the leaves of plants. These pores are called stomata. These stomata surrounded by the kidney shaped guard cells provide many vital functions to the plants.Which of the following functions is not served by the stomata for the plants?a) Exchange of gases, particularly CO2 and O2, with atmosphereb) Loss of water in the form of vapours during transpirationc) Helps to create pressure for the water to rise upward, by its process of transpirationd) Helps the leaves to carry out the process of photosynthesisCorrect answer is option 'D'. Can you explain this answer?
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Tiny pores are found on the surface of the leaves of plants. These pores are called stomata. These stomata surrounded by the kidney shaped guard cells provide many vital functions to the plants.Which of the following functions is not served by the stomata for the plants?a) Exchange of gases, particularly CO2 and O2, with atmosphereb) Loss of water in the form of vapours during transpirationc) Helps to create pressure for the water to rise upward, by its process of transpirationd) Helps the leaves to carry out the process of photosynthesisCorrect answer is option 'D'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Tiny pores are found on the surface of the leaves of plants. These pores are called stomata. These stomata surrounded by the kidney shaped guard cells provide many vital functions to the plants.Which of the following functions is not served by the stomata for the plants?a) Exchange of gases, particularly CO2 and O2, with atmosphereb) Loss of water in the form of vapours during transpirationc) Helps to create pressure for the water to rise upward, by its process of transpirationd) Helps the leaves to carry out the process of photosynthesisCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Tiny pores are found on the surface of the leaves of plants. These pores are called stomata. These stomata surrounded by the kidney shaped guard cells provide many vital functions to the plants.Which of the following functions is not served by the stomata for the plants?a) Exchange of gases, particularly CO2 and O2, with atmosphereb) Loss of water in the form of vapours during transpirationc) Helps to create pressure for the water to rise upward, by its process of transpirationd) Helps the leaves to carry out the process of photosynthesisCorrect answer is option 'D'. Can you explain this answer?.
Tiny pores are found on the surface of the leaves of plants. These pores are called stomata. These stomata surrounded by the kidney shaped guard cells provide many vital functions to the plants.Which of the following functions is not served by the stomata for the plants?a) Exchange of gases, particularly CO2 and O2, with atmosphereb) Loss of water in the form of vapours during transpirationc) Helps to create pressure for the water to rise upward, by its process of transpirationd) Helps the leaves to carry out the process of photosynthesisCorrect answer is option 'D'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Tiny pores are found on the surface of the leaves of plants. These pores are called stomata. These stomata surrounded by the kidney shaped guard cells provide many vital functions to the plants.Which of the following functions is not served by the stomata for the plants?a) Exchange of gases, particularly CO2 and O2, with atmosphereb) Loss of water in the form of vapours during transpirationc) Helps to create pressure for the water to rise upward, by its process of transpirationd) Helps the leaves to carry out the process of photosynthesisCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Tiny pores are found on the surface of the leaves of plants. These pores are called stomata. These stomata surrounded by the kidney shaped guard cells provide many vital functions to the plants.Which of the following functions is not served by the stomata for the plants?a) Exchange of gases, particularly CO2 and O2, with atmosphereb) Loss of water in the form of vapours during transpirationc) Helps to create pressure for the water to rise upward, by its process of transpirationd) Helps the leaves to carry out the process of photosynthesisCorrect answer is option 'D'. Can you explain this answer?.
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