Unit 1 Biological molecules

AQA

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AQA Biology A-levelTopic 3: Organisms exchange substances with their environment Notes
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14

January 2022

2022/2023
AQA Biology A-levelTopic 3: Organisms exchange substances with their environment Notes 1 AQA Biology A-levelTopic 3: Organisms exchange substances with their environment Ntion ExchangeThe need for specialised exchange surfaces arises as the size of the organism, and its surface area to volume ratioincreases. In the case of single celled organisms, the substances can easily enter the cell as the distance that needs to be crossed over is short. However, in multicellu...
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