Question

During day photosynthesis and respiration balance the amount of carbon di oxide and oxygen but at night only respiration takes place.How is the percentage composition maintained then ?

Answer 1

• Plants inhale carbon-dioxide and exhale oxygen during the day as the plants get energy through the photosynthesis process. At night, photosynthesis cannot happen in the absence of sunlight and the stomata of the plants do get closed and the plant exhales the carbon-dioxide.
• The vast amount of carbon-dioxide exhaled by plants and animals at night is used by plants for photosynthesis which balance the oxygen and carbon-dioxide level in the atmosphere.
• Carbon di oxide intake in photosynthesis balanced with carbon di oxide release in respiration. It is called as compensation point.