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What is one way in which energy flow differs from chemical cycling?

skiddd

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What is one way in which energy flow differs from chemical cycling?

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

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