21. understand how local weather and environmental alter might be measured working with living indicators, like phytoplankton, lichens and aquatic river organisms such as mayfly nymphs 18. understand the importance of the purpose of microorganisms while in the nitrogen cycle, which includes decomposition, nitrogen fixation and denitrification 5. remember which https://angelousioh.nizarblog.com/6784285/gcse-english-language-revision-an-overview