2 Biology resources Search within results Go How ratings and recommendations work Apply Filter resourcesClear all filtersLevel AS GCSE SubjectClear filter Biology Exam board AQA WJEC TopicClear filter Exchanges in the roots active transport diffusion diffusion in the leaves osmosis ventilation Resources Crossword Flashcards Multi-tool Quizsearch biology 2 AS, Biology 11 flashcards B3 GCSE, Biology Crossword Search again