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2391.Food is normally digested in the _____?
2392.The lens which coverage a beam of parallel rays of light are called ____?
2393.What is the SI unit of acceleration?
2394.The error caused by improper functioning of instrument is ______?
2395.The general formula for alkanes is _____?
2396.What is produced when fuel is burned?
2397.Which gas is used to extract energy from food in photosynthesis?
2398.Photosynthesis is the chemical reaction that occurs in the leaves of plants. But it requires a special gas, abiotic component from the atmosphere. What is this substance?