In an ecosystem the energy flow is always unidirectional.

In an ecosystem energy flows in :

In an ecosystem energy flows in :

The energy flow in an ecosystem is unidirectional.

Energy flow is unidirectional.

Give scientific reasons for the following statements : Energy flow is always unidirectional in an ecosystem.

In an ecosystem : (i) the flow of energy is unidirectional (ii) the flow of materials is unidirectional (iii) the flow of materials is cyclic (iv) the flow of energy is cyclic.