Spec 1BI0
Revise Edexcel GCSE Biology 8.1.1 Introduction to exchange and transport 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
