Energy expenditure takes place in diffusion

Assertion :- During diffusion of substances there is no energy expenditure. Reason:- Diffusion takes place according to concentration gradient

In which animals excretion takes place by diffusion?

Energy transfer takes place in mechanical wave because of

In which organisms does exchange of gases take place through diffusion ?

Describe the energy changes which take place in an radio.

How does energy change take place in a physical change? Explain.