  We study the absorption of massless scalar waves in a geometry that
interpolates between the Schwarzschild solution and a wormhole that belongs to
the Morris-Thorne class of solutions. In the middle of the interpolation
branch, this geometry describes a regular black hole. We use the partial wave
approach to compute the scalar absorption cross section in this geometry. Our
results show that black holes and wormholes present distinctive absorption
spectra. We conclude, for instance, that the wormhole results are characterized
by the existence of quasibound states which generate Breit-Wigner-like
resonances in the absorption spectrum.
