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Biology- 'Surface area: volume ratios of living organisms and their effects on exchanges with the environment'. All living organisms have to exchange materials through their exchange surfaces with its environment. This is because organisms require the exchange of respiratory gases, carbon dioxide and oxygen, and also the intake of food as well as the disposal of waste. The amount of materials an organism needs depends on its volume. However the exchange rate of materials relies on the surface area: volume ratio of the organism. As an organism grows larger its surface area: volume ratio decreases. The exchange rate of materials occurs fastest when the surface area: volume ratio is larger. Therefore, for larger organisms losing heat and the exchanging materials may be slightly more difficult due to their smaller surface area: volume ratio. This table shows the surface area and volume of cubes increasing in size to prove that the SA/V...

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