1) Organisms are interdependent as the bee depends on flowers for nectar and flowers depend on bees for pollination. Food chains also demonstrate interdependence as organisms rely on others for food. 2) Photosynthesis by plants provides food for animals through food chains and webs while respiration and decay recycle carbon dioxide and nutrients in a cycle. 3) Bacteria and fungi are important decomposers that break down dead organisms, recycling nutrients and keeping ecosystems functioning. Any disruption to interdependence can have wide-ranging consequences.