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אין תוצאות חיפוש עבור: results/At_each_stage_in_a_food_chain__less_material_and_less_energy_are_contained_in_the_biomass_of_the_organisms._This_means_that_the_efficiency_of_food_production_can_be_improved_by_reducing_the_number_of_stages_in_food_chains.,3,0,7033;7852;7879,0,25,1,tn,1.html