Spec 1BI0
Revise Edexcel GCSE Biology 8.1 Exchange surfaces and diffusion with the question bank, lessons, revision guides, and flashcards.
Describe the need to transport substances into and out of a range of organisms, including oxygen, carbon dioxide, water, dissolved food molecules, mineral ions and urea. Explain the need for exchange surfaces and a transport system in multicellular organisms including the calculation of surface area : volume ratio
