3 AS resources Search within results Go How ratings and recommendations work Apply Filter resourcesClear all filtersLevelClear filter AS Subject Biology Exam board AQA TopicClear filter Exchange and Transport Systems Resources Flashcards Mindmap Multi-tool Quiz Revision Cards Gas exchange AS, Biology Mindmap 5.0 / 5 Transport in Plants AS, Biology Quiz 4.0 / 5 Exchange and Transport Systems AS, Biology 8 revision cards Search again