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28.06.2019 •
Biology
(05.02 mc)the diagram below shows a marine food chain with the amount of energy available to each trophic level in parentheses. why does the amount of energy decrease as you move up the chain? a pyramid showing the marine food chain indicating the amount of energy available to each trophic level. at the top of the pyramid, level 5 shows tuna at an energy level of 0.5. trophic level 4 has mackerel at an energy level of 5, trophic level 3 has herring at an energy level of 50, followed by trophic level 2 with zooplankton at an energy level of 500 and phytoplankton at the bottom with an energy level of 2500.a: decomposers are using up the energy between each trophic level.b: individual organisms at the upper trophic levels require less energy to survive than those at the lower ones.c: producers use most of the energy before it can reach the upper levels.d: some energy is lost as heat or not consumed by organisms at the next trophic level.
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Ответ:
D: Some energy is lost as heat or not consumed by organisms at the next trophic level.
Explanation:
As you can see from the diagram, the energy in a food chain is passed in a unidirectional way, starting with producers, passing through consumers and ending between decomposers.
The amount of energy becomes smaller and smaller as the trophic level rises, as a result, the higher trophic levels have less energy. This is because the transfer of energy from the lowest to the highest trophic level causes a loss of energy in the form of heat, in addition, often the energy is not consumed by the organism of the next trophic.
Ответ:
Trees are also very important for us as a renewable resource. Trees are a natural resource that can be renewed - by the planting of trees - replacing the trees that are harvested for use by people. We depend on forest products for things like the wood we burn for heat and the wood we use to make houses and furniture.