a) How do living organisms obtain energy from food?
b) How does Amoeba acquire oxygen from its surroundings?
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a,Organisms obtain energy from the food they consume. The food consumed by the organisms undergo cellular respiration as a result of which energy is released. Mitochondria are called power houses of the cells
b,By the mechanism of diffusion, amoeba obtains oxygen gas dissolved in surrounding water by its plasma membrane. The amoeba uses up the oxygen gas that is diffused within the body and the absorbed oxygen is used to break down the complex food material into simpler molecules.
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