In AP Environmental Science Unit 1, we focus on ecosystems and how animals interact within it. Topics in this unit include: levels of organization, symbiosis (parasitism, mutualism and commensalism), predation, competition, terrestrial and aquatic biomes, biogeochemical cycles (water, nitrogen, carbon, phosphorus, etc.), primary productivity (NPP and GPP), roles in ecosystems, trophic levels, food chains, positive and negative feedback loops, the 10% rule and so much more!With these slides, you'