All living cells require energy for various activities. This (4) energy is available by the breakdown of simple carbohydrates either using

All living cells require energy for various activities. This (4)
energy is available by the breakdown of simple carbohydrates either using oxygen or without using oxygen.(1) Energy in the case of higher plants and animals is obtainedbya) Breathingb) Cellular respirationc) Organ respirationd) Digestion of food​

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