Q² evolution of structure functions in the nucleon and nuclei

$Q^2$ evolution of structure functions in the nucleon and nuclei is investigated by using usual DGLAP equations and parton-recombination equations. Calculated results for proton's $F_2$ and for the ratio $F_2^{Ca}/F_2^D$ are compared with various experimental data. Furthermore, we study nuclear dependence of $Q^2$ evolution in tin and carbon nuclei: $\partial [F_2^{Sn}/F_2^C]/ \partial [ln Q^2]\ne 0$, which was found by NMC.