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...P a g e assignment class subject biology teacher mrs sandhya sood chapter our environment food chain always starts with ozone layer is damaged by what limits the number of trophic levels in good name main source energy self sustaining ecosystem write an aquatic which following non biodegradable paper b wood c cloth d plastic not terrestrial forest desert aquarium grassland will happen if deer missing given grass tiger level fresh water does decomposers do second consists how much percentage solar radiation absorbed all green plants for process photosynthetic belong to same grasshopper spider hawk and lizard acid rain earth known as constitutes goat human cow elephant fish wheat mango flow any system part biotic component algae bacteria natural ecosystems include only fungi microscopic animals herbivores carnivores both living organisms constitute are various steps chains called one sewage groups contain items flowers leather fruit peels cake lime juice environmental friendly practices ...