  The phenomenological sum-rule-based approach is used to discuss the quark
composition dependence of some static electroweak characteristics of
baryons.The role of nonvalence degrees of freedom (the sea partons and/or
peripheral meson currents) is shown to be important to select and make use of
the relevant symmetry parametrization of baryon observables.The implications of
the baryon magnetic moment analysis for estimation of the $\Delta$q values of
the spin-dependent DIS on nucleons, the contribution of hidden strangeness to
the nucleon magnetic moment and to the quark-line-rule violating $\phi \pi$ -
production in antinucleon-nucleon annihilation reaction are presented.
