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Solution


Q.

Flow of energy in an ecosystem is always:
1 unidirectional  
2 bidirectional  
3 multidirectional  
4 no-specific direction  

Ans.

(1)

The energy flow in an ecosystem is always unidirectional. Energy coming from the sun in most natural ecosystems, is used by producers, and then passed on to subsequent trophic levels in the form of food. Energy never flows in the reverse direction, it always gets transferred from the prey to the predator.