A) unidirectional
B) bidirectional
C) multidirectional
D) circular
Correct Answer: A
Solution :
The behaviour of energy in ecosystem is termed as energy flow, ie, unidirectional energy transformation. That is it flows from the producer level to the consumer level and never in the reverse direction. Hence, energy can be used only once in the ecosystem. A large amount of energy is lost at each trophic level. It is estimated that 90% of the energy is lost when it is transferred from one trophic level to another.
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