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...Ncert solutions for class biology chapter ecosystem exercise of questions on page number q fill in the blanks a plants are called as because they fix carbon dioxide b an dominated by trees pyramid numbers is type c aquatic ecosystems limiting factor productivity d common detritivores our e major reservoir earth answer which one following has largest population food chain producers primary consumers secondary decomposers include micro organisms such bacteria and fungi form obtain nutrients breaking down remains dead animals second trophic level lake phytoplankton zooplankton benthos fishes chains that feed upon therefore present at herbivores carnivores none above only thus there no other what percentage photosynthetically active radiation par incident solar out total about fifty percent it forms or distinguish between grazing detritus production decomposition upright inverted web litter f this energy derived from comes organic sun matter generated levels begins with first bodies plant ...