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5 April, 16:33

What is one way in which energy flow differs from chemical cycling? energy flow is unidirectional; chemical elements can be recycled. energy can enter but cannot leave an ecosystem; chemical elements can leave but cannot enter an ecosystem. energy flows from lower to higher trophic levels; chemicals cycle from higher to lower trophic levels. energy can both enter and leave an ecosystem; chemical elements always remain within a single ecosystem?

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  1. 5 April, 18:39
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    A) E nergy flow is unidirectional; chemical elements can be recycled. energy can enter but cannot leave an ecosystem.

    This is because in biology, energy is transferred from organism to organism and some energy is lost along the way. Each energy transfer results in a loss of energy, so that energy is always at a lower level and can never be returned to its original high energy level. On the other hand, chemical elements can form products, then that reaction can be reversed and break back down into reactants. Additionally, the law of conservation of matter says that matter can't be created or destroyed, only transferred from one form to another.
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