1 International Baccalaureate Environmental Science/Studies resources Search within results Go How ratings and recommendations work Apply Filter resourcesClear all filtersLevelClear filter International Baccalaureate SubjectClear filter Environmental Science/Studies Exam board All boards TopicClear filter Chapter 2 - Ecosystems and ecology Resources Crossword Flashcards Multi-tool Quizsearch Species and populations International Baccalaureate, Environmental Science/Studies 18 flashcards Search again