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1. What is respiration in plants?
Ans. Respiration in plants is the process by which they convert glucose and oxygen into carbon dioxide and water, releasing energy in the form of ATP. It is essential for the survival of plants as it provides them with the energy needed for growth, reproduction, and other metabolic activities.
2. How do plants obtain oxygen for respiration?
Ans. Plants obtain oxygen for respiration through tiny pores called stomata, which are present on the surface of their leaves and stems. These stomata allow the exchange of gases between the plant and the atmosphere, enabling the plant to take in oxygen and release carbon dioxide.
3. What is the role of mitochondria in respiration in plants?
Ans. The mitochondria are the powerhouse of the cell and play a crucial role in respiration in plants. They are responsible for breaking down glucose and other organic molecules obtained from photosynthesis and converting them into ATP, which is the energy currency of the cell.
4. How does temperature affect respiration in plants?
Ans. Temperature has a significant impact on the rate of respiration in plants. Generally, the rate of respiration increases with an increase in temperature up to a certain point, after which it starts to decline. Higher temperatures can enhance enzymatic activity, leading to increased respiration, while extremely high temperatures can inhibit respiration and damage the plant.
5. Can plants respire in the absence of light?
Ans. Yes, plants can respire in the absence of light. Unlike photosynthesis, which requires light, respiration in plants can occur both in light and dark conditions. During the day, plants perform both photosynthesis and respiration, while during the night, when there is no light for photosynthesis, respiration continues to provide the energy required for plant metabolism.
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